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Ball jump
Developer User20307｜Date and time 24/2/26 17:18:27
Build time 6.523 sec｜Game capacity 1.379KB｜

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[PR]現在の欲しいものランキング

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

<!DOCTYPE html>
<html>
<head>
<title>Ball Jump Game</title>
<style>
    canvas {
        border: 1px solid black;
    }
</style>
</head>
<body>
<canvas id="gameCanvas" width="400" height="400"></canvas>
<script>
    const canvas = document.getElementById('gameCanvas');
    const ctx = canvas.getContext('2d');
    
    let ball = {
        x: 200,
        y: 350,
        size: 20,
        speed: 4,
        dx: 0,
        dy: 0
    };

function drawBall() {
        ctx.beginPath();
        ctx.arc(ball.x, ball.y, ball.size, 0, Math.PI * 2);
        ctx.fillStyle = 'blue';
        ctx.fill();
    }

function clear() {
        ctx.clearRect(0, 0, canvas.width, canvas.height);
    }

function newPos() {
        ball.y += ball.dy;
    }

function updateGameArea() {
        clear();
        drawBall();
        newPos();
        requestAnimationFrame(updateGameArea);
    }

function moveUp() {
        ball.dy = -ball.speed;
    }

function moveDown() {
        ball.dy = ball.speed;
    }

document.addEventListener('keyup', function() {
        ball.dy = 0;
    });

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