如何利用HTML5源码打造自己的小游戏？

HTML5 小游戏源码通常包括 HTML、CSS 和 JavaScript 文件。这些文件共同定义了游戏的结构、样式和功能。

<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF8">
    <title>打砖块游戏</title>
    <style>
        canvas {
            border: 1px solid black;
        }
    </style>
</head>
<body>
    <canvas id="gameCanvas" width="480" height="320"></canvas>
    <script>
        var canvas = document.getElementById("gameCanvas");
        var ctx = canvas.getContext("2d");
        var ballRadius = 10;
        var x = canvas.width / 2;
        var y = canvas.height  30;
        var dx = 2;
        var dy = 2;
        var paddleHeight = 10;
        var paddleWidth = 75;
        var paddleX = (canvas.width  paddleWidth) / 2;
        var rightPressed = false;
        var leftPressed = false;
        var brickRowCount = 3;
        var brickColumnCount = 5;
        var brickWidth = 75;
        var brickHeight = 20;
        var brickPadding = 10;
        var brickOffsetTop = 30;
        var brickOffsetLeft = 30;
        var bricks = [];
        for (var c = 0; c < brickColumnCount; c++) {
            bricks[c] = [];
            for (var r = 0; r < brickRowCount; r++) {
                bricks[c][r] = { x: 0, y: 0, status: 1 };
            }
        }
        document.addEventListener("keydown", keyDownHandler, false);
        document.addEventListener("keyup", keyUpHandler, false);
        document.addEventListener("mousemove", mouseMoveHandler, false);
        function keyDownHandler(e) {
            if (e.key == "Right" || e.key == "ArrowRight") {
                rightPressed = true;
            } else if (e.key == "Left" || e.key == "ArrowLeft") {
                leftPressed = true;
            }
        }
        function keyUpHandler(e) {
            if (e.key == "Right" || e.key == "ArrowRight") {
                rightPressed = false;
            } else if (e.key == "Left" || e.key == "ArrowLeft") {
                leftPressed = false;
            }
        }
        function mouseMoveHandler(e) {
            var relativeX = e.clientX  canvas.offsetLeft;
            if (relativeX > 0 && relativeX < canvas.width) {
                paddleX = relativeX  paddleWidth / 2;
            }
        }
        function drawBall() {
            ctx.beginPath();
            ctx.arc(x, y, ballRadius, 0, Math.PI * 2);
            ctx.fillStyle = "#0095DD";
            ctx.fill();
            ctx.closePath();
        }
        function drawPaddle() {
            ctx.beginPath();
            ctx.rect(paddleX, canvas.height  paddleHeight, paddleWidth, paddleHeight);
            ctx.fillStyle = "#0095DD";
            ctx.fill();
            ctx.closePath();
        }
        function drawBricks() {
            for (var c = 0; c < brickColumnCount; c++) {
                for (var r = 0; r < brickRowCount; r++) {
                    if (bricks[c][r].status == 1) {
                        var brickX = (c * (brickWidth + brickPadding)) + brickOffsetLeft;
                        var brickY = (r * (brickHeight + brickPadding)) + brickOffsetTop;
                        bricks[c][r].x = brickX;
                        bricks[c][r].y = brickY;
                        ctx.beginPath();
                        ctx.rect(brickX, brickY, brickWidth, brickHeight);
                        ctx.fillStyle = "#0095DD";
                        ctx.fill();
                        ctx.closePath();
                    }
                }
            }
        }
        function collisionDetection() {
            for (var c = 0; c < brickColumnCount; c++) {
                for (var r = 0; r < brickRowCount; r++) {
                    var b = bricks[c][r];
                    if (b.status == 1) {
                        if (x > b.x && x < b.x + brickWidth && y > b.y && y < b.y + brickHeight) {
                            dy = dy;
                            b.status = 0;
                        }
                    }
                }
            }
        }
        function draw() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            drawBricks();
            drawBall();
            drawPaddle();
            collisionDetection();
            if (x + dx > canvas.width  ballRadius || x + dx < ballRadius) {
                dx = dx;
            }
            if (y + dy < ballRadius) {
                dy = dy;
            } else if (y + dy > canvas.height  ballRadius) {
                if (x > paddleX && x < paddleX + paddleWidth) {
                    dy = dy;
                } else {
                    alert("游戏结束");
                    document.location.reload();
                    clearInterval(interval); // Needed for Chrome to end game
                }
            }
            if (rightPressed && paddleX < canvas.width  paddleWidth) {
                paddleX += 7;
            } else if (leftPressed && paddleX > 0) {
                paddleX = 7;
            }
            x += dx;
            y += dy;
        }
        var interval = setInterval(draw, 10);
    </script>
</body>
</html>

将以上代码复制到一个名为index.html的文件中，然后用浏览器打开该文件即可运行游戏。