Models 44

GPT-6.1 Terra

by OpenAIReasoningClean
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Running live in a sandboxed frame. Click inside it before using the keyboard.

How it went

Total time
4 min 17 s
Cost
$0.105
Output tokens
20,993
Spent thinking
8,542 tokens
Speed
85.1 tok/s
Console errors
0
First token after
10.0 s
First visible text after
2 min 31 s
Prompt tokens
508
Code size
35.9 KB
Finish reason
stop
Served by
OpenAI
Model id
openai/gpt-6.1-terra
Reasoning sent
{"effort":"xhigh"}
Max output
128,000 tokens
Generated
Nov 12, 2026

What it was asked

The prompt
Build a polished Breakout (brick breaker) game in a single HTML file using vanilla JavaScript and a <canvas>. Requirements: - A paddle controlled with the mouse and with the left/right arrow keys. - The bounce angle off the paddle depends on where the ball hits it (center = straight up, edges = sharp angle). - One level with at least 6 rows of bricks, mixing normal bricks and tougher bricks that need 2 hits and visibly crack after the first one. - Some bricks visibly carry a power-up icon; when broken they drop it, and catching it with the paddle gives either a wider paddle (10 seconds) or multi-ball (3 balls). - The ball must never pass through bricks or the paddle. - Particles when a brick breaks. - 3 lives, score displayed. Game over and victory screens with a restart option.
System prompt, sent with every prompt
You are generating a self-contained web demo. It will be rendered automatically in a sandboxed iframe and compared side by side with the output of other AI models given the exact same task.

Output rules:
- Reply with exactly ONE fenced code block containing the complete file: ```html (or ```svg when the task asks for an SVG). No text before or after the code block.
- Everything must be inline: CSS in <style>, JavaScript in <script>. No external files, images, fonts or network requests, except the CDN URLs explicitly allowed by the task.
- Do not use localStorage, sessionStorage, cookies, IndexedDB, alert(), confirm(), prompt() or window.open(): they are blocked in the sandbox and will throw.
- The page must look right in a 1280×800 viewport and adapt gracefully down to 375px wide. No horizontal scrollbar.
- Something meaningful must be visible on first paint: a screenshot is taken automatically about 3 seconds after load, without any interaction.
- Everything that makes the demo interesting must be visible within the first seconds: nothing hidden behind a high score, a later level or a long play session.
- Games must start in a self-playing demo mode (a simple AI plays) behind a "Click or press a key to start" message, so the game can be judged in action without playing.
- The iframe only receives keyboard events after the user clicks it: if the demo uses the keyboard, display a clear "Click or press a key to start" message.
- The code must run with zero errors in the console of the latest Chrome.

Code run-1.html · 743 lines

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Brick Breaker</title>
<style>
  :root {
    color-scheme: dark;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: #f5f6ff;
    background: #090b14;
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    min-width: 0;
    min-height: 100vh;
    background:
      radial-gradient(ellipse at 18% 3%, rgba(100, 76, 160, .16), transparent 34%),
      radial-gradient(ellipse at 92% 75%, rgba(32, 112, 126, .11), transparent 30%),
      #090b14;
  }
  button { font: inherit; }
  .app { width: min(1150px, calc(100% - 48px)); margin: 0 auto; padding: 24px 0 18px; }
  .topbar { height: 48px; display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
  .brand { display: flex; align-items: center; gap: 12px; }
  .brand-mark {
    width: 43px; height: 43px; border-radius: 12px; display: grid; place-items: center;
    background: linear-gradient(145deg, #ff8c82, #f25c80);
    box-shadow: 0 6px 24px rgba(255, 104, 123, .23);
  }
  .brand-name { font-size: 17px; font-weight: 850; line-height: 1; letter-spacing: -.055em; }
  .brand-name span { color: #ff8b86; }
  .brand-sub { margin-top: 5px; font-size: 9px; font-weight: 750; color: #777d94; letter-spacing: .19em; }
  .top-right { display: flex; align-items: center; gap: 18px; }
  .edition { color: #6e748a; font-size: 10px; font-weight: 750; letter-spacing: .15em; }
  .mode-pill {
    border: 1px solid #2c3540; background: #151d25; border-radius: 99px;
    color: #b0e6d7; padding: 8px 11px; font-size: 9px; font-weight: 800; letter-spacing: .1em;
    white-space: nowrap;
  }
  .dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: #78e5bd; margin-right: 6px; box-shadow: 0 0 10px #78e5bd; vertical-align: 1px; }
  .layout { display: grid; grid-template-columns: minmax(0, 1fr) 252px; gap: 18px; align-items: stretch; }
  .game-panel, .sidebar { border: 1px solid #292c3d; background: #121520; border-radius: 15px; overflow: hidden; box-shadow: 0 20px 65px rgba(0,0,0,.25); }
  .game-head { height: 64px; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; gap: 15px; }
  .level { display: flex; align-items: center; gap: 11px; min-width: 0; }
  .level-number { display: grid; place-items: center; width: 35px; height: 35px; border: 1px solid #42404c; border-radius: 9px; color: #ffb09a; background: #28212b; font-size: 13px; font-weight: 850; }
  .eyebrow { font-size: 9px; font-weight: 800; letter-spacing: .15em; color: #777e96; }
  .level-title { font-size: 13px; font-weight: 750; margin-top: 3px; white-space: nowrap; }
  .stats { display: flex; align-items: center; gap: 27px; }
  .stat { min-width: 72px; }
  .stat-value { font-variant-numeric: tabular-nums; font-size: 17px; font-weight: 800; line-height: 1; margin-top: 5px; letter-spacing: .05em; }
  .hearts { display: flex; gap: 5px; margin-top: 6px; }
  .heart { width: 15px; height: 14px; fill: #ff7888; filter: drop-shadow(0 0 5px rgba(255, 108, 132, .3)); }
  .heart.empty { fill: #3a3d4e; filter: none; }
  .play-wrap { position: relative; background: #0b0e1a; line-height: 0; overflow: hidden; border-top: 1px solid #292c3d; }
  canvas { display: block; width: 100%; height: auto; aspect-ratio: 900 / 580; touch-action: none; cursor: crosshair; }
  .demo-note {
    position: absolute; z-index: 2; left: 50%; top: 72%; transform: translate(-50%, -50%);
    width: max-content; max-width: 88%; text-align: center; pointer-events: none; line-height: 1.35;
    background: rgba(16, 20, 33, .88); border: 1px solid rgba(146, 154, 184, .24);
    border-radius: 12px; padding: 11px 19px 12px; box-shadow: 0 12px 35px rgba(0,0,0,.22);
    backdrop-filter: blur(8px);
  }
  .demo-note .mini { color: #8fe0c4; font-size: 9px; font-weight: 800; letter-spacing: .15em; }
  .demo-note strong { display: block; color: #f5f5fc; font-size: 13px; margin-top: 5px; font-weight: 750; }
  .demo-note small { display: block; color: #8f95aa; font-size: 10px; margin-top: 3px; }
  .end-screen {
    position: absolute; inset: 0; z-index: 4; display: grid; place-items: center;
    background: rgba(9, 11, 21, .83); backdrop-filter: blur(5px); line-height: 1.3; text-align: center;
  }
  [hidden] { display: none !important; }
  .end-card { padding: 25px; }
  .end-icon { display: grid; place-items: center; margin: 0 auto 14px; width: 48px; height: 48px; border-radius: 15px; background: #302431; color: #ff988d; font-size: 24px; }
  .end-card h2 { margin: 7px 0; font-size: clamp(25px, 4vw, 38px); letter-spacing: -.05em; }
  .end-card p { margin: 0 0 20px; color: #a2a8bb; font-size: 13px; }
  .primary-button {
    border: 0; border-radius: 9px; padding: 11px 19px; color: #19121a; background: #ff9488;
    font-weight: 800; font-size: 12px; cursor: pointer;
  }
  .primary-button:hover { background: #ffb0a5; }
  .sidebar { padding: 22px 19px 17px; display: flex; flex-direction: column; }
  .section-tag { color: #7f859c; font-size: 9px; font-weight: 800; letter-spacing: .16em; }
  .mission-head { display: flex; justify-content: space-between; align-items: flex-start; }
  .mission-number { font-size: 27px; color: #37394a; font-weight: 850; letter-spacing: -.08em; line-height: 1; }
  .mission-title { font-size: 20px; font-weight: 800; letter-spacing: -.045em; margin: 11px 0 6px; }
  .mission-copy { color: #9299ae; line-height: 1.6; font-size: 11px; margin: 0; max-width: 190px; }
  .divider { height: 1px; background: #292d3b; margin: 19px 0; }
  .power-list { display: grid; gap: 13px; margin-top: 15px; }
  .power-row { display: flex; align-items: center; gap: 11px; }
  .power-icon { width: 37px; height: 37px; border-radius: 10px; display: grid; place-items: center; flex: 0 0 auto; }
  .power-icon.wide { background: rgba(77, 210, 192, .13); color: #75e3d1; border: 1px solid rgba(95, 221, 201, .2); }
  .power-icon.multi { background: rgba(255, 171, 112, .13); color: #ffc28a; border: 1px solid rgba(255, 178, 119, .2); }
  .power-name { color: #e7e9f3; font-weight: 800; font-size: 10px; letter-spacing: .045em; }
  .power-desc { margin-top: 4px; color: #858ca1; font-size: 10px; }
  .power-desc.active { color: #83e6c5; }
  .progress-heading { display: flex; justify-content: space-between; align-items: center; }
  .remaining { font-size: 11px; color: #cdd0de; font-weight: 800; font-variant-numeric: tabular-nums; }
  .progress-track { height: 5px; background: #2a2e3d; border-radius: 9px; margin-top: 13px; overflow: hidden; }
  .progress-fill { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #fb8584, #f8c77b); transition: width .25s; }
  .progress-caption { display: flex; justify-content: space-between; margin-top: 8px; font-size: 9px; color: #777e92; }
  .tough-tip { display: flex; gap: 9px; align-items: center; margin-top: 15px; font-size: 10px; color: #9ca2b5; }
  .tough-swatch { width: 30px; height: 18px; border-radius: 4px; background: #a68fee; border: 1px solid #c9b9ff; display: grid; place-items: center; color: #51427c; font-weight: 900; font-size: 14px; line-height: 1; }
  .controls { margin-top: auto; }
  .controls .divider { margin: 18px 0; }
  .control-row { display: flex; align-items: center; gap: 10px; margin-top: 12px; color: #9ca3b6; font-size: 10px; }
  .key-pair { display: flex; gap: 4px; }
  .key { width: 25px; height: 23px; display: grid; place-items: center; border: 1px solid #3a3e50; border-bottom-width: 2px; border-radius: 5px; background: #1e2230; color: #c9cddd; font-size: 12px; }
  .restart { width: 100%; margin-top: 16px; padding: 10px; border: 1px solid #393d4e; border-radius: 8px; background: #1b1e2b; color: #c9ccda; font-weight: 750; font-size: 10px; letter-spacing: .03em; cursor: pointer; }
  .restart:hover { background: #292d3b; color: #fff; }
  .restart span { font-size: 14px; margin-right: 5px; vertical-align: -1px; }
  .footer { display: flex; justify-content: space-between; padding: 15px 3px 0; color: #686e83; font-size: 9px; font-weight: 750; letter-spacing: .1em; }
  @media (max-width: 800px) {
    .layout { grid-template-columns: minmax(0, 1fr); }
    .sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .sidebar > .divider { display: none; }
    .sidebar .controls { margin-top: 0; }
    .controls .divider { display: none; }
    .mission-copy { max-width: 240px; }
  }
  @media (max-width: 480px) {
    .app { width: calc(100% - 28px); padding-top: 16px; }
    .topbar { margin-bottom: 17px; }
    .edition { display: none; }
    .brand-mark { width: 39px; height: 39px; }
    .brand-name { font-size: 15px; }
    .brand-sub { font-size: 8px; }
    .mode-pill { font-size: 8px; padding: 7px 9px; }
    .game-head { height: 58px; padding: 0 11px; gap: 8px; }
    .level { gap: 7px; }
    .level-number { width: 30px; height: 30px; }
    .level-title { font-size: 10px; }
    .eyebrow { font-size: 8px; }
    .stats { gap: 10px; }
    .stat { min-width: 53px; }
    .stat-value { font-size: 13px; }
    .heart { width: 12px; height: 12px; }
    .hearts { gap: 3px; }
    .demo-note { padding: 7px 12px; top: 72%; }
    .demo-note .mini { font-size: 8px; }
    .demo-note strong { font-size: 10px; margin-top: 3px; }
    .demo-note small { display: none; }
    .sidebar { padding: 18px 15px; gap: 18px 12px; }
    .mission-title { font-size: 18px; }
    .footer { font-size: 8px; }
  }
</style>
</head>
<body>
<div class="app">
  <header class="topbar">
    <div class="brand">
      <div class="brand-mark" aria-hidden="true">
        <svg width="25" height="25" viewBox="0 0 25 25" fill="none">
          <rect x="3" y="4" width="8" height="5" rx="1.5" fill="#fff" opacity=".95"/>
          <rect x="13" y="4" width="9" height="5" rx="1.5" fill="#fff" opacity=".65"/>
          <rect x="6" y="11" width="9" height="5" rx="1.5" fill="#fff" opacity=".7"/>
          <rect x="17" y="11" width="5" height="5" rx="1.5" fill="#fff" opacity=".95"/>
          <rect x="5" y="19" width="15" height="2.5" rx="1.25" fill="#fff"/>
        </svg>
      </div>
      <div><div class="brand-name">BRICK<span>BREAKER</span></div><div class="brand-sub">A LITTLE GAME OF BIG BOUNCES</div></div>
    </div>
    <div class="top-right">
      <div class="edition">THE ARCADE COLLECTION &nbsp; / &nbsp; 01</div>
      <div class="mode-pill"><span class="dot"></span><span id="modeLabel">AUTO-PLAY ON</span></div>
    </div>
  </header>

  <main class="layout">
    <section class="game-panel" aria-label="Brick Breaker game">
      <div class="game-head">
        <div class="level">
          <div class="level-number">01</div>
          <div><div class="eyebrow">LEVEL ONE</div><div class="level-title">The neon wall</div></div>
        </div>
        <div class="stats">
          <div class="stat"><div class="eyebrow">SCORE</div><div class="stat-value" id="score">000000</div></div>
          <div class="stat"><div class="eyebrow">LIVES</div><div class="hearts" id="hearts" aria-label="3 lives remaining">
            <svg class="heart" viewBox="0 0 24 22"><path d="M12 21s-10-6.3-10-13A5.5 5.5 0 0 1 12 4.9 5.5 5.5 0 0 1 22 8c0 6.7-10 13-10 13Z"/></svg>
            <svg class="heart" viewBox="0 0 24 22"><path d="M12 21s-10-6.3-10-13A5.5 5.5 0 0 1 12 4.9 5.5 5.5 0 0 1 22 8c0 6.7-10 13-10 13Z"/></svg>
            <svg class="heart" viewBox="0 0 24 22"><path d="M12 21s-10-6.3-10-13A5.5 5.5 0 0 1 12 4.9 5.5 5.5 0 0 1 22 8c0 6.7-10 13-10 13Z"/></svg>
          </div></div>
        </div>
      </div>
      <div class="play-wrap">
        <canvas id="game" aria-label="Breakout playfield. Move the paddle with your mouse or arrow keys."></canvas>
        <div class="demo-note" id="demoNote">
          <div class="mini"><span class="dot"></span>AUTO-PLAY RUNNING</div>
          <strong>Click or press a key to start</strong>
          <small>Take over whenever you're ready</small>
        </div>
        <div class="end-screen" id="endScreen" hidden>
          <div class="end-card">
            <div class="end-icon" id="endIcon">✦</div>
            <div class="eyebrow" id="endEyebrow">GAME OVER</div>
            <h2 id="endTitle">Nice run.</h2>
            <p id="endCopy"></p>
            <button class="primary-button" id="playAgain">Play again ↗</button>
          </div>
        </div>
      </div>
    </section>

    <aside class="sidebar">
      <div>
        <div class="mission-head"><div class="section-tag">YOUR OBJECTIVE</div><div class="mission-number">01</div></div>
        <div class="mission-title">Clear the wall.</div>
        <p class="mission-copy">Keep the ball in play and break every brick. You've got this.</p>
      </div>
      <div class="divider"></div>
      <div>
        <div class="section-tag">POWER-UPS</div>
        <div class="power-list">
          <div class="power-row">
            <div class="power-icon wide"><svg width="23" height="23" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.7" stroke-linecap="round" stroke-linejoin="round"><path d="M4 10h16M7 7l-3 3 3 3M17 7l3 3-3 3"/><rect x="6" y="16" width="12" height="3" rx="1.5" fill="currentColor" stroke="none"/></svg></div>
            <div><div class="power-name">WIDE PADDLE</div><div class="power-desc" id="wideStatus">More room · 10 seconds</div></div>
          </div>
          <div class="power-row">
            <div class="power-icon multi"><svg width="23" height="23" viewBox="0 0 24 24" fill="currentColor"><circle cx="12" cy="7" r="3"/><circle cx="6.5" cy="16" r="3"/><circle cx="17.5" cy="16" r="3"/></svg></div>
            <div><div class="power-name">MULTI-BALL</div><div class="power-desc" id="multiStatus">Three balls in play</div></div>
          </div>
        </div>
      </div>
      <div class="divider"></div>
      <div>
        <div class="progress-heading"><div class="section-tag">THE WALL</div><div class="remaining" id="remaining">66 / 66</div></div>
        <div class="progress-track"><div class="progress-fill" id="progressFill"></div></div>
        <div class="progress-caption"><span>BRICKS REMAINING</span><span id="percent">0% CLEARED</span></div>
        <div class="tough-tip"><span class="tough-swatch">ϟ</span><span>Some bricks take 2 hits.</span></div>
      </div>
      <div class="controls">
        <div class="divider"></div>
        <div class="section-tag">HOW TO PLAY</div>
        <div class="control-row"><div class="key-pair"><span class="key">←</span><span class="key">→</span></div><span>Arrow keys or mouse to move</span></div>
        <div class="control-row"><span style="color:#ffb098;font-size:14px;width:54px;text-align:center">↗</span><span>Hit edges for sharper angles</span></div>
        <button class="restart" id="restart"><span>↻</span> RESTART GAME</button>
      </div>
    </aside>
  </main>
  <footer class="footer"><span>MADE FOR A LITTLE BREAK</span><span>GOOD LUCK, HAVE FUN ✦</span></footer>
</div>

<script>
(() => {
  'use strict';
  const W = 900, H = 580, ROWS = 6, COLS = 11, TOTAL = ROWS * COLS;
  const canvas = document.getElementById('game');
  const ctx = canvas.getContext('2d');
  const dpr = Math.min(window.devicePixelRatio || 1, 2);
  canvas.width = W * dpr;
  canvas.height = H * dpr;
  ctx.setTransform(dpr, 0, 0, dpr, 0, 0);

  const ui = {
    score: document.getElementById('score'), hearts: document.getElementById('hearts'),
    remaining: document.getElementById('remaining'), percent: document.getElementById('percent'),
    progress: document.getElementById('progressFill'), demo: document.getElementById('demoNote'),
    mode: document.getElementById('modeLabel'), end: document.getElementById('endScreen'),
    endIcon: document.getElementById('endIcon'), endEyebrow: document.getElementById('endEyebrow'),
    endTitle: document.getElementById('endTitle'), endCopy: document.getElementById('endCopy'),
    wide: document.getElementById('wideStatus'), multi: document.getElementById('multiStatus')
  };
  const heartNodes = Array.from(ui.hearts.children);
  const colors = ['#ff7b88', '#ff9b7e', '#f6c478', '#b59af6', '#79adf5', '#69d8c9'];
  const powerMap = {
    '0,2':'wide', '0,8':'multi', '1,5':'wide', '2,1':'multi',
    '2,9':'wide', '3,4':'multi', '4,2':'wide', '4,8':'multi',
    '5,1':'wide', '5,6':'multi', '5,9':'wide'
  };
  let bricks, balls, drops, particles, paddle, score, lives, remaining, wideTime;
  let mode, clock, keys, inputMode, mouseTarget, levelCleared, uiCache;
  const brickWidth = (W - 90 - 10 * 8) / COLS;

  const clamp = (v, a, b) => Math.max(a, Math.min(b, v));
  function makeBall(x, y, vx, vy) {
    return { x, y, vx, vy, r: 6.5, trail: [], trailTimer: 0, lastBrick: null, lastHit: -10 };
  }
  function buildBricks() {
    const list = [];
    for (let row = 0; row < ROWS; row++) {
      for (let col = 0; col < COLS; col++) {
        const tough = ((row * 7 + col * 3) % 6 === 0 || (row + col * 2) % 11 === 3);
        list.push({
          x: 45 + col * (brickWidth + 8), y: 67 + row * 34,
          w: brickWidth, h: 25, row, col, color: colors[row],
          hp: tough ? 2 : 1, maxHp: tough ? 2 : 1,
          power: powerMap[row + ',' + col] || null, alive: true
        });
      }
    }
    // The first demonstration hit reliably releases a multi-ball.
    const firstPower = list[5 * COLS + 6];
    firstPower.hp = firstPower.maxHp = 1;
    return list;
  }
  function reset(demo) {
    mode = demo ? 'demo' : 'playing';
    bricks = buildBricks();
    paddle = { x: W / 2 - 65, y: H - 46, w: 130, h: 12 };
    balls = [makeBall(450, 430, 150, -360)];
    drops = []; particles = [];
    score = 0; lives = 3; remaining = TOTAL; wideTime = 0; clock = 0;
    keys = { left: false, right: false };
    inputMode = 'keyboard'; mouseTarget = W / 2; levelCleared = false; uiCache = '';
    ui.demo.hidden = !demo;
    ui.end.hidden = true;
    ui.mode.textContent = demo ? 'AUTO-PLAY ON' : 'GAME IN PROGRESS';
    updateUI();
  }
  function updateUI() {
    const key = [score, lives, remaining, Math.ceil(wideTime), balls.length, mode].join('|');
    if (key === uiCache) return;
    uiCache = key;
    ui.score.textContent = String(score).padStart(6, '0');
    heartNodes.forEach((node, i) => node.classList.toggle('empty', i >= lives));
    ui.hearts.setAttribute('aria-label', lives + (lives === 1 ? ' life remaining' : ' lives remaining'));
    ui.remaining.textContent = remaining + ' / ' + TOTAL;
    const pct = Math.round((TOTAL - remaining) / TOTAL * 100);
    ui.percent.textContent = pct + '% CLEARED';
    ui.progress.style.width = pct + '%';
    ui.wide.textContent = wideTime > 0 ? 'Active · ' + Math.ceil(wideTime) + ' seconds' : 'More room · 10 seconds';
    ui.wide.classList.toggle('active', wideTime > 0);
    ui.multi.textContent = balls.length > 1 ? 'Active · ' + balls.length + ' balls in play' : 'Three balls in play';
    ui.multi.classList.toggle('active', balls.length > 1);
  }
  function finish(won) {
    mode = won ? 'won' : 'over';
    ui.mode.textContent = won ? 'WALL CLEARED' : 'GAME OVER';
    ui.endIcon.textContent = won ? '✦' : '↻';
    ui.endEyebrow.textContent = won ? 'LEVEL COMPLETE' : 'GAME OVER';
    ui.endTitle.textContent = won ? 'Wall cleared!' : 'Nice run.';
    ui.endCopy.textContent = (won ? 'Every brick, beautifully broken. ' : 'The wall wins this round. ') + 'Final score: ' + score.toLocaleString() + '.';
    ui.end.hidden = false;
    updateUI();
  }

  function burst(x, y, color, count, soft) {
    for (let i = 0; i < count; i++) {
      const a = Math.random() * Math.PI * 2;
      const speed = (soft ? 35 : 65) + Math.random() * (soft ? 75 : 150);
      const life = .25 + Math.random() * .5;
      particles.push({ x, y, vx: Math.cos(a) * speed, vy: Math.sin(a) * speed - 30,
        life, max: life, size: 2 + Math.random() * 4, color });
    }
  }
  function hitBrick(brick, ball) {
    if (!brick.alive || (ball.lastBrick === brick && clock - ball.lastHit < .06)) return;
    ball.lastBrick = brick;
    ball.lastHit = clock;
    brick.hp--;
    if (brick.hp > 0) {
      score += 25;
      burst(ball.x, ball.y, brick.color, 5, true);
    } else {
      brick.alive = false;
      remaining--;
      score += brick.maxHp === 2 ? 150 : 100;
      burst(brick.x + brick.w / 2, brick.y + brick.h / 2, brick.color, 13, false);
      if (brick.power) drops.push({ x: brick.x + brick.w / 2, y: brick.y + brick.h / 2, type: brick.power, r: 12 });
      if (remaining === 0) levelCleared = true;
    }
  }

  // Continuous collision detection against rectangle faces and rounded corners.
  function sweepCircleRect(ball, rect, maxTime) {
    let best = null;
    const x = ball.x, y = ball.y, vx = ball.vx, vy = ball.vy, r = ball.r;
    const eps = 1e-7;
    function test(t, nx, ny) {
      if (t < -eps || t > maxTime + eps || vx * nx + vy * ny >= -eps) return;
      t = Math.max(0, t);
      if (!best || t < best.t) best = { t, nx, ny };
    }
    if (vx > 0) {
      const t = (rect.x - r - x) / vx, yy = y + vy * t;
      if (yy >= rect.y - eps && yy <= rect.y + rect.h + eps) test(t, -1, 0);
    } else if (vx < 0) {
      const t = (rect.x + rect.w + r - x) / vx, yy = y + vy * t;
      if (yy >= rect.y - eps && yy <= rect.y + rect.h + eps) test(t, 1, 0);
    }
    if (vy > 0) {
      const t = (rect.y - r - y) / vy, xx = x + vx * t;
      if (xx >= rect.x - eps && xx <= rect.x + rect.w + eps) test(t, 0, -1);
    } else if (vy < 0) {
      const t = (rect.y + rect.h + r - y) / vy, xx = x + vx * t;
      if (xx >= rect.x - eps && xx <= rect.x + rect.w + eps) test(t, 0, 1);
    }
    const corners = [
      [rect.x, rect.y, -1, -1], [rect.x + rect.w, rect.y, 1, -1],
      [rect.x, rect.y + rect.h, -1, 1], [rect.x + rect.w, rect.y + rect.h, 1, 1]
    ];
    const a = vx * vx + vy * vy;
    for (const corner of corners) {
      const dx = x - corner[0], dy = y - corner[1];
      const b = 2 * (dx * vx + dy * vy), c = dx * dx + dy * dy - r * r;
      const disc = b * b - 4 * a * c;
      if (disc < 0 || !a) continue;
      const t = (-b - Math.sqrt(disc)) / (2 * a);
      if (t < -eps || t > maxTime + eps) continue;
      const nx = (x + vx * t - corner[0]) / r;
      const ny = (y + vy * t - corner[1]) / r;
      if (nx * corner[2] >= -eps && ny * corner[3] >= -eps) test(t, nx, ny);
    }
    return best;
  }

  function moveBall(ball, dt) {
    let timeLeft = dt, iterations = 0;
    while (timeLeft > 1e-7 && iterations++ < 12) {
      let best = null;
      function offer(t, nx, ny, type, object) {
        if (t < -1e-7 || t > timeLeft + 1e-7) return;
        t = Math.max(0, t);
        if (!best || t < best.t) best = { t, nx, ny, type, object };
      }
      if (ball.vx < 0) offer((ball.r - ball.x) / ball.vx, 1, 0, 'wall');
      if (ball.vx > 0) offer((W - ball.r - ball.x) / ball.vx, -1, 0, 'wall');
      if (ball.vy < 0) offer((ball.r - ball.y) / ball.vy, 0, 1, 'wall');

      if (ball.vy > 0 && ball.y <= paddle.y + 1) {
        const hit = sweepCircleRect(ball, paddle, timeLeft);
        if (hit) offer(hit.t, hit.nx, hit.ny, 'paddle');
      }
      for (const brick of bricks) {
        if (!brick.alive) continue;
        // Broad-phase rejection keeps the precise sweep inexpensive.
        const endX = ball.x + ball.vx * timeLeft, endY = ball.y + ball.vy * timeLeft;
        if (Math.max(ball.x, endX) + ball.r < brick.x || Math.min(ball.x, endX) - ball.r > brick.x + brick.w ||
            Math.max(ball.y, endY) + ball.r < brick.y || Math.min(ball.y, endY) - ball.r > brick.y + brick.h) continue;
        const hit = sweepCircleRect(ball, brick, timeLeft);
        if (hit) offer(hit.t, hit.nx, hit.ny, 'brick', brick);
      }
      if (!best) {
        ball.x += ball.vx * timeLeft;
        ball.y += ball.vy * timeLeft;
        break;
      }
      ball.x += ball.vx * best.t;
      ball.y += ball.vy * best.t;
      timeLeft -= Math.max(best.t, .000001);
      if (best.type === 'paddle') {
        const offset = clamp((ball.x - (paddle.x + paddle.w / 2)) / (paddle.w / 2), -1, 1);
        const angle = offset * 1.08;
        const speed = Math.max(390, Math.hypot(ball.vx, ball.vy));
        ball.vx = Math.sin(angle) * speed;
        ball.vy = -Math.cos(angle) * speed;
        ball.y = Math.min(ball.y, paddle.y - ball.r - .04);
        burst(ball.x, paddle.y, '#a9fff1', 4, true);
      } else {
        if (best.type === 'brick') hitBrick(best.object, ball);
        const dot = ball.vx * best.nx + ball.vy * best.ny;
        ball.vx -= 2 * dot * best.nx;
        ball.vy -= 2 * dot * best.ny;
        ball.x += best.nx * .025;
        ball.y += best.ny * .025;
      }
    }
    ball.trailTimer += dt;
    if (ball.trailTimer > .025) {
      ball.trailTimer = 0;
      ball.trail.unshift({ x: ball.x, y: ball.y });
      if (ball.trail.length > 9) ball.trail.pop();
    }
  }

  function activatePower(type) {
    if (type === 'wide') {
      wideTime = 10;
      const center = paddle.x + paddle.w / 2;
      paddle.w = 190;
      paddle.x = clamp(center - paddle.w / 2, 0, W - paddle.w);
    } else if (balls.length && balls.length < 3) {
      const base = balls[0];
      const speed = Math.max(390, Math.hypot(base.vx, base.vy));
      const angle = Math.atan2(base.vy, base.vx);
      let n = 0;
      while (balls.length < 3) {
        const rotated = angle + (n++ === 0 ? .38 : -.38);
        balls.push(makeBall(base.x, base.y, Math.cos(rotated) * speed, Math.sin(rotated) * speed));
      }
    }
    burst(paddle.x + paddle.w / 2, paddle.y, type === 'wide' ? '#72e8d1' : '#ffc58b', 16, false);
  }
  function predictLanding(ball) {
    if (ball.vy <= 0) return ball.x;
    const time = Math.max(0, (paddle.y - ball.r - ball.y) / ball.vy);
    const span = W - 2 * ball.r;
    let x = (ball.x - ball.r + ball.vx * time) % (2 * span);
    if (x < 0) x += 2 * span;
    return ball.r + (x > span ? 2 * span - x : x);
  }
  function updatePaddle(dt) {
    let target;
    if (mode === 'demo') {
      const descending = balls.filter(b => b.vy > 0).sort((a, b) => b.y - a.y);
      const ball = descending[0] || balls[0];
      target = ball ? predictLanding(ball) + Math.sin(clock * 1.6) * 16 : W / 2;
      const nearbyDrop = drops.filter(d => d.y > H - 155).sort((a, b) => b.y - a.y)[0];
      if (nearbyDrop) {
        const eta = ball && ball.vy > 0 ? (paddle.y - ball.y) / ball.vy : 10;
        if (eta > .7) target = nearbyDrop.x;
        else if (Math.abs(target - nearbyDrop.x) < paddle.w + 8) target = (target + nearbyDrop.x) / 2;
      }
      const desired = clamp(target - paddle.w / 2, 0, W - paddle.w);
      paddle.x += clamp(desired - paddle.x, -700 * dt, 700 * dt);
    } else if (keys.left || keys.right) {
      paddle.x += ((keys.right ? 1 : 0) - (keys.left ? 1 : 0)) * 680 * dt;
    } else if (inputMode === 'mouse') {
      paddle.x = mouseTarget - paddle.w / 2;
    }
    paddle.x = clamp(paddle.x, 0, W - paddle.w);
  }

  function update(dt) {
    if (mode !== 'demo' && mode !== 'playing') return;
    clock += dt;
    if (wideTime > 0) {
      wideTime = Math.max(0, wideTime - dt);
      if (wideTime === 0) {
        const center = paddle.x + paddle.w / 2;
        paddle.w = 130;
        paddle.x = clamp(center - paddle.w / 2, 0, W - paddle.w);
      }
    }
    updatePaddle(dt);
    for (let i = drops.length - 1; i >= 0; i--) {
      const drop = drops[i], oldY = drop.y;
      drop.y += 125 * dt;
      if (oldY + drop.r <= paddle.y && drop.y + drop.r >= paddle.y &&
          drop.x + drop.r >= paddle.x && drop.x - drop.r <= paddle.x + paddle.w) {
        drops.splice(i, 1);
        activatePower(drop.type);
      } else if (drop.y > H + 20) drops.splice(i, 1);
    }
    for (let i = balls.length - 1; i >= 0; i--) {
      moveBall(balls[i], dt);
      if (balls[i].y > H + balls[i].r + 4) balls.splice(i, 1);
    }
    for (let i = particles.length - 1; i >= 0; i--) {
      const p = particles[i];
      p.life -= dt; p.x += p.vx * dt; p.y += p.vy * dt; p.vy += 170 * dt;
      if (p.life <= 0) particles.splice(i, 1);
    }
    if (levelCleared) {
      if (mode === 'demo') reset(true);
      else finish(true);
      return;
    }
    if (!balls.length) {
      lives--;
      if (lives <= 0) {
        if (mode === 'demo') reset(true);
        else finish(false);
        return;
      }
      wideTime = 0;
      paddle.w = 130;
      paddle.x = clamp(paddle.x, 0, W - paddle.w);
      drops = [];
      balls.push(makeBall(paddle.x + paddle.w / 2, paddle.y - 18, 150, -360));
    }
    updateUI();
  }

  function roundRect(x, y, w, h, r) {
    ctx.beginPath();
    ctx.roundRect(x, y, w, h, r);
  }
  function drawIcon(type, x, y, scale, color) {
    ctx.save();
    ctx.translate(x, y);
    ctx.scale(scale, scale);
    ctx.strokeStyle = color; ctx.fillStyle = color; ctx.lineWidth = 1.7;
    ctx.lineCap = 'round'; ctx.lineJoin = 'round';
    if (type === 'multi') {
      for (const p of [[0, -4], [-4, 3], [4, 3]]) {
        ctx.beginPath(); ctx.arc(p[0], p[1], 2.4, 0, Math.PI * 2); ctx.fill();
      }
    } else {
      ctx.beginPath(); ctx.moveTo(-7, -1); ctx.lineTo(7, -1);
      ctx.moveTo(-4.5, -3.5); ctx.lineTo(-7, -1); ctx.lineTo(-4.5, 1.5);
      ctx.moveTo(4.5, -3.5); ctx.lineTo(7, -1); ctx.lineTo(4.5, 1.5); ctx.stroke();
      roundRect(-5, 4, 10, 2.5, 1.25); ctx.fill();
    }
    ctx.restore();
  }
  function drawBackground() {
    const bg = ctx.createLinearGradient(0, 0, 0, H);
    bg.addColorStop(0, '#101322'); bg.addColorStop(.58, '#0e1221'); bg.addColorStop(1, '#111724');
    ctx.fillStyle = bg; ctx.fillRect(0, 0, W, H);
    let glow = ctx.createRadialGradient(W * .5, H * .2, 10, W * .5, H * .2, 480);
    glow.addColorStop(0, 'rgba(105,79,149,.12)'); glow.addColorStop(1, 'rgba(105,79,149,0)');
    ctx.fillStyle = glow; ctx.fillRect(0, 0, W, H);
    glow = ctx.createRadialGradient(W * .5, H * .95, 0, W * .5, H * .95, 340);
    glow.addColorStop(0, 'rgba(53,146,151,.11)'); glow.addColorStop(1, 'rgba(53,146,151,0)');
    ctx.fillStyle = glow; ctx.fillRect(0, 0, W, H);
    ctx.strokeStyle = 'rgba(154,166,205,.035)'; ctx.lineWidth = 1;
    for (let x = 0; x < W; x += 45) { ctx.beginPath(); ctx.moveTo(x + .5, 0); ctx.lineTo(x + .5, H); ctx.stroke(); }
    for (let y = 0; y < H; y += 45) { ctx.beginPath(); ctx.moveTo(0, y + .5); ctx.lineTo(W, y + .5); ctx.stroke(); }
    ctx.strokeStyle = 'rgba(167,177,213,.045)';
    ctx.beginPath(); ctx.arc(W / 2, 418, 100, 0, Math.PI * 2); ctx.stroke();
    ctx.beginPath(); ctx.arc(W / 2, 418, 143, 0, Math.PI * 2); ctx.stroke();
    ctx.font = '700 10px system-ui, sans-serif'; ctx.letterSpacing = '1.5px';
    ctx.fillStyle = '#697087'; ctx.fillText('THE WALL', 45, 42);
    ctx.textAlign = 'right'; ctx.fillText('BREAK THEM ALL', W - 45, 42); ctx.textAlign = 'left';
    ctx.letterSpacing = '0px';
    ctx.fillStyle = 'rgba(157,167,192,.36)';
    ctx.fillRect(45, 49, 26, 2); ctx.fillRect(W - 71, 49, 26, 2);
    ctx.font = '700 9px system-ui, sans-serif'; ctx.fillStyle = 'rgba(140,154,182,.45)';
    ctx.fillText('PLAYER 01', 23, H - 20);
    ctx.textAlign = 'right'; ctx.fillText('KEEP IT IN PLAY', W - 23, H - 20); ctx.textAlign = 'left';
  }
  function drawBricks() {
    for (const b of bricks) {
      if (!b.alive) continue;
      ctx.save();
      ctx.shadowColor = b.color; ctx.shadowBlur = 8;
      ctx.globalAlpha = .18; ctx.fillStyle = b.color;
      roundRect(b.x, b.y + 2, b.w, b.h, 5); ctx.fill();
      ctx.restore();
      const g = ctx.createLinearGradient(0, b.y, 0, b.y + b.h);
      g.addColorStop(0, b.color); g.addColorStop(1, b.color);
      ctx.fillStyle = g;
      roundRect(b.x, b.y, b.w, b.h, 5); ctx.fill();
      ctx.fillStyle = 'rgba(255,255,255,.20)';
      roundRect(b.x + 2, b.y + 2, b.w - 4, 3, 2); ctx.fill();
      ctx.strokeStyle = 'rgba(255,255,255,.23)'; ctx.lineWidth = 1;
      roundRect(b.x + .5, b.y + .5, b.w - 1, b.h - 1, 5); ctx.stroke();
      if (b.maxHp === 2) {
        ctx.fillStyle = 'rgba(29,24,47,.46)';
        roundRect(b.x + b.w - 16, b.y + 6, 10, 12, 3); ctx.fill();
        ctx.fillStyle = 'rgba(255,255,255,.8)';
        ctx.fillRect(b.x + b.w - 13, b.y + 9, 1.5, 6);
        ctx.fillRect(b.x + b.w - 10, b.y + 9, 1.5, 6);
      }
      if (b.power) drawIcon(b.power, b.x + b.w / 2 - (b.maxHp === 2 ? 5 : 0), b.y + b.h / 2, .9, 'rgba(255,255,255,.95)');
      if (b.hp === 1 && b.maxHp === 2) {
        ctx.strokeStyle = 'rgba(45,28,56,.8)'; ctx.lineWidth = 1.6; ctx.lineJoin = 'round';
        ctx.beginPath();
        ctx.moveTo(b.x + 19, b.y + 1); ctx.lineTo(b.x + 23, b.y + 8);
        ctx.lineTo(b.x + 19, b.y + 12); ctx.lineTo(b.x + 25, b.y + 16);
        ctx.lineTo(b.x + 22, b.y + b.h - 1);
        ctx.moveTo(b.x + 23, b.y + 8); ctx.lineTo(b.x + 30, b.y + 6);
        ctx.moveTo(b.x + 25, b.y + 16); ctx.lineTo(b.x + 32, b.y + 18);
        ctx.stroke();
      }
    }
  }
  function draw() {
    drawBackground();
    drawBricks();
    for (const drop of drops) {
      ctx.save();
      const color = drop.type === 'wide' ? '#74e6d2' : '#ffc18d';
      ctx.shadowColor = color; ctx.shadowBlur = 20;
      ctx.fillStyle = drop.type === 'wide' ? '#194944' : '#5d3835';
      ctx.strokeStyle = color; ctx.lineWidth = 1.5;
      ctx.beginPath(); ctx.arc(drop.x, drop.y, 12, 0, Math.PI * 2); ctx.fill(); ctx.stroke();
      ctx.shadowBlur = 0; drawIcon(drop.type, drop.x, drop.y, 1, color);
      ctx.restore();
    }
    for (const p of particles) {
      ctx.globalAlpha = Math.max(0, p.life / p.max);
      ctx.fillStyle = p.color;
      roundRect(p.x, p.y, p.size, p.size, 1); ctx.fill();
    }
    ctx.globalAlpha = 1;
    for (const ball of balls) {
      ball.trail.forEach((p, i) => {
        ctx.fillStyle = 'rgba(190,255,243,' + ((1 - i / ball.trail.length) * .23) + ')';
        ctx.beginPath(); ctx.arc(p.x, p.y, ball.r * (1 - i / (ball.trail.length + 2)) * .8, 0, Math.PI * 2); ctx.fill();
      });
      ctx.save();
      ctx.shadowColor = '#9df8e6'; ctx.shadowBlur = 18;
      ctx.fillStyle = '#effff9'; ctx.beginPath(); ctx.arc(ball.x, ball.y, ball.r, 0, Math.PI * 2); ctx.fill();
      ctx.restore();
      ctx.fillStyle = '#ffffff'; ctx.beginPath(); ctx.arc(ball.x - 1.5, ball.y - 1.5, 2.3, 0, Math.PI * 2); ctx.fill();
    }
    ctx.save();
    ctx.shadowColor = '#72e3d4'; ctx.shadowBlur = 18;
    const pg = ctx.createLinearGradient(0, paddle.y, 0, paddle.y + paddle.h);
    pg.addColorStop(0, '#e4fff8'); pg.addColorStop(.35, '#9cf5e5'); pg.addColorStop(1, '#58cbbd');
    ctx.fillStyle = pg; roundRect(paddle.x, paddle.y, paddle.w, paddle.h, 6); ctx.fill();
    ctx.restore();
    ctx.fillStyle = 'rgba(255,255,255,.65)';
    roundRect(paddle.x + 12, paddle.y + 2, paddle.w - 24, 2, 1); ctx.fill();
  }

  function pointerPosition(event) {
    const rect = canvas.getBoundingClientRect();
    mouseTarget = clamp((event.clientX - rect.left) / rect.width * W, 0, W);
    inputMode = 'mouse';
  }
  canvas.addEventListener('pointerdown', event => {
    if (mode === 'demo') reset(false);
    if (mode === 'playing') pointerPosition(event);
  });
  canvas.addEventListener('pointermove', event => {
    if (mode === 'playing') pointerPosition(event);
  });
  document.addEventListener('pointerdown', event => {
    if (mode === 'demo' && !event.target.closest('button')) reset(false);
  });
  document.addEventListener('keydown', event => {
    if (event.key === 'ArrowLeft' || event.key === 'ArrowRight' || event.key === ' ') event.preventDefault();
    if (mode === 'demo') reset(false);
    else if ((mode === 'over' || mode === 'won') && (event.key === 'Enter' || event.key === ' ')) {
      reset(false);
      return;
    }
    if (mode !== 'playing') return;
    if (event.key === 'ArrowLeft') { keys.left = true; inputMode = 'keyboard'; }
    if (event.key === 'ArrowRight') { keys.right = true; inputMode = 'keyboard'; }
  });
  document.addEventListener('keyup', event => {
    if (event.key === 'ArrowLeft') keys.left = false;
    if (event.key === 'ArrowRight') keys.right = false;
  });
  window.addEventListener('blur', () => { keys.left = false; keys.right = false; });
  document.getElementById('restart').addEventListener('click', () => reset(false));
  document.getElementById('playAgain').addEventListener('click', () => reset(false));

  reset(true);
  draw();
  let last = performance.now(), accumulator = 0;
  const step = 1 / 120;
  function frame(now) {
    accumulator += Math.min((now - last) / 1000, .05);
    last = now;
    while (accumulator >= step) {
      update(step);
      accumulator -= step;
    }
    draw();
    requestAnimationFrame(frame);
  }
  requestAnimationFrame(frame);
})();
</script>
</body>
</html>
Reasoning trace (8,542 tokens)
**Designing game layout**

I’m planning a game frame with a luminous navy arcade theme, incorporating bright orange, pink, and blue. The board size is 840x600, fitting within a layout max of 1150. For the desktop, I want the content width at 1150, with a main panel width of 875 and a sidebar of 250 plus a gap. The overall height will be around 746 when considering the header, game, and footer. I'll position the HUD strategically within this design to enhance player experience.**Structuring game visuals**

I’m envisioning the game layout with a bordered stage around the board and a scoreboard at the top header. The internal canvas will use a coordinate system of 900x580, making the game dimensions 900 in width and 580 in height. I’m considering 6 rows and 11 columns, which should yield a width of about 72. The bricks should be placed from y=66 to 210, and I want to ensure there are visible crack styles for added texture.**Considering game layout adjustments**

I'm thinking about positioning the bottom overlay at around 100 pixels, centering instructions there. It might overlap the game a bit, but that could work for the stage's visual. Maybe I could try placing the overlay closer to the bottom within the game area, near the paddle. Also, I might need to adjust the board bricks to reach up to 210 pixels and leave an empty area in the center for the ball while setting the overlay at 65% of the height.**Evaluating ball collision logic**

I'm considering how a ball might pass through after a sweep expansion. It seems like it should only happen when it's moving downward and positioned correctly below the paddle to avoid collisions from underneath. The contact would need to be normal to the paddle for brick collision checks. I should also address any potential overlap issues during the expanded axis-aligned collision detection. It's crucial to get the logic right here!**Considering collision dynamics**

I’m thinking about how the side paddle's interactions could affect the ball's speed, maybe using multipliers to encourage progression while keeping the speed between 370 and 420. I want to avoid horizontal ball movement that feels endless, limiting it to a maximum angle of 58 degrees. 

For wall collisions, I’m planning to ensure interactions behave normally, traveling until they collide. I also need to address special challenges with brick collisions and the possibility of overlapping adjacent bricks, which could complicate responses.**Planning collision detection**

I’m considering the standard approach for calculating collisions with the four side boundaries of a rectangle when the ball moves toward it. I’ll focus on both the edges and corners, using a quadratic circle-ray for accuracy. 

I’ll compute the time until the next collision based on the ball’s velocity. Important factors include ensuring the contact points align appropriately with the rectangle's limits, nudging the ball out slightly at contact, and updating time accordingly. Also, I’ll ensure I account for multiple adjacent bricks effectively.**Analyzing paddle collisions**

I’m developing a method to analyze how the ball interacts with walls and the paddle. For wall collisions, I’m focusing on specific coordinates, such as when x is less than or equal to the radius. I want to apply similar logic for the paddle, especially when the ball is above it.

Using a swept circle approach will help with angled corners and adjusting bounce angles. I need to ensure that the ball is above the paddle after a hit, capturing only the corners when appropriate.**Evaluating ball dynamics**

I'm figuring out how to track landing with a predicted wall reflection using the absolute center and paddle. There’s a possibility that if the paddle stays centered, the ball might strike straight down repetitively. So, I’m considering using a sinusoidal offset for aiming, ensuring the ball hits the side to change its trajectory. The demo involves calculating targets and starting velocities while keeping an eye on brick collisions and a reset approach if predictions fail.**Designing a game interface**

I’m envisioning an arcade-style game interface with six brick rows featuring various icons. I think about using bright colors, like a salmon orange for the top, amber second, violet third, blue fourth, aqua fifth, and green teal sixth. The background will have a dark grid with subtle gradients, and I want it polished and consistent. For the scoreboard, I’ll position it on the left and I’m considering using SVG graphics for the lives display.**Setting up game mechanics**

I’m planning to use markup for hearts with CSS classes, as there’s no network involved. I need to create an icon logo and a tile grid using CSS or inline SVG. There should be screens for victory and game over, with a restart option available. I’m considering having a header for "NEW GAME" and a sidebar action button to restart the game. A global key press or click on the canvas should initiate gameplay, and I’ll ensure pointer events are correctly handled.**Refining game controls**

I'm thinking about the click event for the restart button to avoid duplication. I want to ensure the document pointerdown listener only triggers the start if it's in demo mode and not on restart. I’ll ensure that a mouse move only updates the target after a click event. For paddle movement, I’ll smooth it out based on mouse movement, mapping event coordinates to the canvas accordingly. The keys for left and right will also work, and I’ll prevent default actions for arrow and space keys.**Adjusting ball physics**

I'm considering the AI's approach to handling the ball's bounce angle, which relies on a relative diagonal line. At around t = 2.4, the ball might still be rising, which is essential for the autopilot to aim effectively, either targeting the current path or preparing for a drop. It's crucial to ensure that the score panel captures the first screenshot accurately with vibrant row colors, especially when the target power is high enough at y > 435.**Planning CSS layout**

I'm considering the CSS for a header with top margin and a background color for the body. The app width should have a maximum of 1150px or 100% minus 48px, with margin auto. If the screen is less than 850px, I might switch the grid to a single column, and adapt at smaller widths. I need to ensure elements fit well and look good on mobile, while also keeping text legible. The power-up timer UI and layout for mobile devices are also on my mind.**Evaluating game mechanics**

I'm thinking about the scoring system for this game involving different badges and power blocks. For a normal hit, I would award 10 points and 20 points for a tough hit. Initially, there might be no score after the first hit, but maybe just 5 points. I'm considering what happens visually when the brick is hit, like cracks in the graphics and sparks for a tougher collision. I need to handle collision logic carefully to avoid double hits, ensuring smooth gameplay and reflection mechanics.**Calculating collision mechanics**

I'm working on a function to handle collisions between a moving ball and a rectangle using a sweep calculation. The goal is to find the best contact point, so I need to check for side candidates and corner intersections. I want to consider the ball's velocity direction and ensure it's moving toward the rectangle. There’s also the challenge of handling overlap due to floating-point precision. Additionally, I need to ensure reflections work correctly if the ball collides adjacent to a brick or wall. This involves careful clamping and handling for different scenarios.**Drawing ball trails**

I'm considering how to implement ball trails, either by maintaining them per frame or at fixed intervals, like pushing the ball's trail every four ticks. Each trail can store its position and lifespan. I'm thinking of using a radial draw style with white and yellow colors that fade over time. Additionally, I want to implement particle physics with a fixed delta time. I also need to check for ball collection based on its position relative to the paddle, ensuring the right visual representation for different particle types.**Designing game elements**

I'm working on rendering a decorative initial ball for a game canvas. First, I need to ensure power-up brick icons are high contrast because of their small CSS size. I'll define the icon using small circles and wide lines to avoid overlap. I’m planning a six-row color gradient for the bricks and considering adding shadows and highlights. The mission sidebar will include dynamic text to engage players. It sounds intricate, but I think it will look great when finished!**Planning layout dimensions**

I'm crafting a progress section for the wall controls. I need to fit everything into a panel that is 620 pixels wide. To achieve this, I’m considering the padding and dimensions for various elements: the objective at 110, power at 180, wall at 100, control at 115, and restart at 44. Adding the spaces, the total should be around 549, which leaves me with enough room for everything, fitting within the 618 stage!**Designing overlay elements**

I'm considering an overlay width of 250. I wonder if the original "CLICK OR PRESS A KEY TO START" will fit in two lines? Font size 13 seems fine, with a stage width of 860 and target at 260. On mobile, I'll shrink the overlay width to 215 at 347 width. Using uppercase eyebrows sounds good too! Plus, I want "AUTO-PLAY RUNNING" to be smaller with a green dot. I’m thinking about a dark intro overlay to keep the focus on the ball. Finally, I’ll make sure the score and lives are prominent in the design layout!**Evaluating win conditions**

I need to draw a win screen overlay when the player has no remaining items left. There's a collision event I need to check. If the remaining count is zero, I set the state to 'won'. In demo mode, I want to reset, but calling reset within a nested loop may cause issues, so I’ll use a deferred flag like `levelCleared = true`. After processing, I'll determine if I should reset or just finish as 'won'.**Evaluating ball trajectory and power**

I’m analyzing the ball’s trajectory at different time points. At t2.4, the ball hits bricks and bounces downward, with its y-coordinate around 100. I’m predicting where it will land based on its descent and the power level. The target landing area and initial ball angle could be adjusted to improve catchability. It’s important to consider offsets in the demo target to optimize the second ball's impact and ensure it hits the power correctly.**Structuring visual elements**

I'm thinking we should create a visual layout with fixed text on the left and right at the top, like "THE WALL" and "CLEAR ALL BRICKS," accompanied by a decorative bar for extra flair. This will help with creating structure. I also want to make sure the accessibility canvas includes aria elements to cater to touch and keyboard interactions. Avoiding alerts about the network is a good idea too. Now, let's get this composition going!