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No:45870

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particle
Developer User18896｜Date and time 24/2/21 23:05:25
Build time 5.209 sec｜Game capacity 1.287KB｜

Script

// HTML file containing JavaScript for a simple game

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// HTML file containing JavaScript for a simple game

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Particle Game</title>
</head>
<body>
    <canvas id="gameCanvas" width="400" height="600"></canvas>

let particle = {
            x: 200,
            y: 300,
            radius: 20,
            color: 'blue',
            speed: 2
        };

function drawParticle() {
            ctx.beginPath();
            ctx.arc(particle.x, particle.y, particle.radius, 0, 2 * Math.PI);
            ctx.fillStyle = particle.color;
            ctx.fill();
            ctx.closePath();
        }

function update() {
            particle.y += particle.speed;
            
            if(particle.y > canvas.height) {
                particle.y = -particle.radius;
            }
        }

function gameLoop() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            drawParticle();
            update();
            
            requestAnimationFrame(gameLoop);
        }

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