ブロック崩しクリアしたら次のステージに行くタイトルはゲーム試作's game

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ブロック崩しクリアしたら次のステージに行くタイトルはゲーム試作
Developer User21022｜Date and time 24/3/4 19:49:51
Build time 17.982 sec｜Game capacity 5.064KB｜

Script

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Click here for free DL of the app version that can save data.

<!DOCTYPE html>
<html>
<head>
    <title>ブロック崩し ゲーム試作</title>
</head>
<body>
    <canvas id="gameCanvas" width="400" height="400"></canvas>

const ballRadius = 10;
        let x = canvas.width / 2;
        let y = canvas.height - 30;
        let dx = 2;
        let dy = -2;

const paddleHeight = 10;
        const paddleWidth = 75;
        let paddleX = (canvas.width - paddleWidth) / 2;

let rightPressed = false;
        let leftPressed = false;

const brickRowCount = 3;
        const brickColumnCount = 5;
        const brickWidth = 75;
        const brickHeight = 20;
        const brickPadding = 10;
        const brickOffsetTop = 30;
        const brickOffsetLeft = 30;

let score = 0;

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 drawScore() {
            ctx.font = "16px Arial";
            ctx.fillStyle = "#0095DD";
            ctx.fillText("Score: " + score, 8, 20);
        }

function draw() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            drawBall();
            drawPaddle();
            drawBricks();
            collisionDetection();
            drawScore();

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("Game Over, Your Score: " + score);
                    document.location.reload();
                }
            }

if(rightPressed && paddleX < canvas.width - paddleWidth) {
                paddleX += 7;
            } else if(leftPressed && paddleX > 0) {
                paddleX -= 7;
            }

x += dx;
            y += dy;

requestAnimationFrame(draw);
        }

document.addEventListener("keydown", keyDownHandler, false);
        document.addEventListener("keyup", keyUpHandler, 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;
            }
        }

draw();
    </script>
</body>
</html>