横版游戏开发指南

// 游戏对象初始化
const player = {
    x: 100, y: 300,
    width: 30, height: 40,
    speed: 5, jumpForce: 12,
    gravity: 0.5, velocityY: 0,
    isJumping: false, color: '#FF0000'
};

// 敌人初始化
const enemies = [
    { x: 600, y: 340, width: 30, height: 30, 
      speed: 3, direction: -1, color: '#00FF00' },
    { x: 400, y: 340, width: 30, height: 30, 
      speed: 2, direction: 1, color: '#0000FF' }
];

// 游戏主循环
function gameLoop() {
    if (!gameRunning) return;
    
    update(); // 更新游戏状态
    draw();   // 渲染游戏画面
    requestAnimationFrame(gameLoop);
}

// 碰撞检测函数
function checkCollision(rect1, rect2) {
    return rect1.x < rect2.x + rect2.width &&
           rect1.x + rect1.width > rect2.x &&
           rect1.y < rect2.y + rect2.height &&
           rect1.y + rect1.height > rect2.y;
}