钢琴块小游戏

document.addEventListener('DOMContentLoaded', () => { const gameArea = document.getElementById('game-area'); const scoreElement = document.getElementById('score'); const startButton = document.getElementById('start-button');

let score = 0;
let gameInterval = null;
let isGameRunning = false;

// 创建一行方块
function createRow() {
    const row = document.createElement('div');
    row.className = 'row';
    
    // 随机选择一个方块作为黑块
    const blackIndex = Math.floor(Math.random() * 4);
    
    for (let i = 0; i < 4; i++) {
        const block = document.createElement('div');
        block.className = 'block';
        if (i === blackIndex) {
            block.classList.add('black');
        }
        row.appendChild(block);
    }
    
    gameArea.insertBefore(row, gameArea.firstChild);
}

// 移除最后一行
function removeLastRow() {
    if (gameArea.children.length > 6) {
        const lastRow = gameArea.lastChild;
        
        // 检查最后一行是否有未点击的黑块
        for (const block of lastRow.children) {
            if (block.classList.contains('black')) {
                endGame();
                return;
            }
        }
        
        gameArea.removeChild(lastRow);
    }
}

// 游戏主循环
function gameLoop() {
    createRow();
    removeLastRow();
}

// 开始游戏
function startGame() {
    score = 0;
    scoreElement.textContent = score;
    gameArea.innerHTML = '';
    isGameRunning = true;
    startButton.disabled = true;
    
    // 初始创建3行
    for (let i = 0; i < 3; i++) {
        createRow();
    }
    
    gameInterval = setInterval(gameLoop, 1000);
}

// 结束游戏
function endGame() {
    clearInterval(gameInterval);
    isGameRunning = false;
    startButton.disabled = false;
    alert(`游戏结束！你的得分是: ${score}`);
}

// 点击方块处理
gameArea.addEventListener('click', (e) => {
    if (!isGameRunning) return;
    
    const block = e.target;
    if (block.classList.contains('black')) {
        score++;
        scoreElement.textContent = score;
        block.classList.remove('black');
        block.style.backgroundColor = '#ddd';
    } else {
        endGame();
    }
});

startButton.addEventListener('click', startGame);

});