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No:50877

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Billiards
Developer User21428｜Date and time 24/3/10 2:29:18
Build time 4.368 sec｜Game capacity 1.299KB｜

Script

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[PR]現在の欲しいゲームランキング

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

<!DOCTYPE html>
<html lang="zh">

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

function drawBall() {
            ctx.beginPath();
            ctx.arc(x, y, ballRadius, 0, Math.PI * 2);
            ctx.fillStyle = 'red';
            ctx.fill();
            ctx.closePath();
        }

function draw() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            drawBall();

x += dx;
            y += dy;

if(x + dx > canvas.width - ballRadius || x + dx < ballRadius) {
                dx = -dx;
            }

if(y + dy < ballRadius) {
                dy = -dy;
            } else if(y + dy > canvas.height - ballRadius) {
                alert('游戏结束');
                document.location.reload();
            }
        }

setInterval(draw, 10);
    </script>
</body>

</html>