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Script

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>2D Space Shooter</title>
  <style>
    body {
      margin: 0;
      padding: 0;
      background: #0d0e15;
      color: #fff;
      font-family: Arial, sans-serif;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      overflow: hidden;
    }
    #game-container {
      position: relative;
    }
    canvas {
      border: 2px solid #00f0ff;
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
      background: #05050a;
    }
    .ui-layer {
      position: absolute;
      top: 10px;
      left: 10px;
      font-size: 18px;
      font-weight: bold;
      pointer-events: none;
    }
  </style>
</head>
<body>

<div id="game-container">
  <div class="ui-layer">
    Score: <span id="score">0</span> | Lives: <span id="lives">3</span>
  </div>
  <canvas id="gameCanvas" width="600" height="700"></canvas>
</div>

<script>
  const canvas = document.getElementById('gameCanvas');
  const ctx = canvas.getContext('2d');
  const scoreEl = document.getElementById('score');
  const livesEl = document.getElementById('lives');

  // Input listener tracking
  const keys = {};
  window.addEventListener('keydown', e => keys[e.code] = true);
  window.addEventListener('keyup', e => keys[e.code] = false);

  // Player Object
  const player = {
    x: canvas.width / 2 - 20,
    y: canvas.height - 60,
    width: 40,
    height: 40,
    speed: 6,
    score: 0,
    lives: 3,
    lastShot: 0
  };

  let bullets = [];
  let enemies = [];
  let gameOver = false;

  // Spawning logic
  let enemyTimer = 0;

  function spawnEnemy() {
    const width = 30 + Math.random() * 20;
    enemies.push({
      x: Math.random() * (canvas.width - width),
      y: -40,
      width: width,
      height: width,
      speed: 2 + Math.random() * 3
    });
  }

  function update() {
    if (gameOver) return;

    // Player Movement
    if ((keys['ArrowLeft'] || keys['KeyA']) && player.x > 0) player.x -= player.speed;
    if ((keys['ArrowRight'] || keys['KeyD']) && player.x + player.width < canvas.width) player.x += player.speed;
    
    // Shooting (Spacebar with 150ms cooldown)
    if (keys['Space'] && Date.now() - player.lastShot > 150) {
      bullets.push({
        x: player.x + player.width / 2 - 3,
        y: player.y,
        width: 6,
        height: 15,
        speed: 10
      });
      player.lastShot = Date.now();
    }

    // Move Bullets
    bullets.forEach((bullet, index) => {
      bullet.y -= bullet.speed;
      if (bullet.y < -10) bullets.splice(index, 1);
    });

    // Spawn Enemies
    enemyTimer++;
    if (enemyTimer % 45 === 0) {
      spawnEnemy();
    }

    // Move & Check Enemies
    enemies.forEach((enemy, eIndex) => {
      enemy.y += enemy.speed;

      // Enemy passes bottom line
      if (enemy.y > canvas.height) {
        enemies.splice(eIndex, 1);
        player.lives--;
        livesEl.innerText = player.lives;
        if (player.lives <= 0) gameOver = true;
      }

      // Bullet vs Enemy Collision
      bullets.forEach((bullet, bIndex) => {
        if (
          bullet.x < enemy.x + enemy.width &&
          bullet.x + bullet.width > enemy.x &&
          bullet.y < enemy.y + enemy.height &&
          bullet.y + bullet.height > enemy.y
        ) {
          enemies.splice(eIndex, 1);
          bullets.splice(bIndex, 1);
          player.score += 10;
          scoreEl.innerText = player.score;
        }
      });

      // Player vs Enemy Collision
      if (
        player.x < enemy.x + enemy.width &&
        player.x + player.width > enemy.x &&
        player.y < enemy.y + enemy.height &&
        player.y + player.height > enemy.y
      ) {
        enemies.splice(eIndex, 1);
        player.lives--;
        livesEl.innerText = player.lives;
        if (player.lives <= 0) gameOver = true;
      }
    });
  }

  function draw() {
    // Clear Screen
    ctx.clearRect(0, 0, canvas.width, canvas.height);

    // Draw Player Ship
    ctx.fillStyle = '#00f0ff';
    ctx.beginPath();
    ctx.moveTo(player.x + player.width / 2, player.y);
    ctx.lineTo(player.x + player.width, player.y + player.height);
    ctx.lineTo(player.x, player.y + player.height);
    ctx.closePath();
    ctx.fill();

    // Draw Bullets
    ctx.fillStyle = '#ff0055';
    bullets.forEach(bullet => {
      ctx.fillRect(bullet.x, bullet.y, bullet.width, bullet.height);
    });

    // Draw Enemies
    ctx.fillStyle = '#ffb703';
    enemies.forEach(enemy => {
      ctx.fillRect(enemy.x, enemy.y, enemy.width, enemy.height);
    });

    // Game Over Overlay
    if (gameOver) {
      ctx.fillStyle = 'rgba(0,0,0,0.75)';
      ctx.fillRect(0, 0, canvas.width, canvas.height);

      ctx.fillStyle = '#ff0055';
      ctx.font = '36px Arial';
      ctx.textAlign = 'center';
      ctx.fillText('GAME OVER', canvas.width / 2, canvas.height / 2 - 20);

      ctx.fillStyle = '#fff';
      ctx.font = '18px Arial';
      ctx.fillText('Refresh page to restart', canvas.width / 2, canvas.height / 2 + 20);
    }
  }

  // Main Loop
  function gameLoop() {
    update();
    draw();
    requestAnimationFrame(gameLoop);
  }

  gameLoop();
</script>
</body>
</html>canvas.widthcanvas.heightplayer.widthplayer.lastShotlivesEl.innerTextenemy.widthenemy.heightbullet.widthbullet.heightplayer.scoreplayer.heightscoreEl.innerTextplayer.heightctx.fontctx.fillStylectx.textAlign

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6KB

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6KB

Content Size

119.0ms

Dom Content Loaded

188.0ms

First Paint

120.0ms

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