Geometry Dash JavaScript Game Clone

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Geometry Dash Clone</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            overflow: hidden;
            background-color: #222;
            font-family: 'Arial', sans-serif;
        }
        canvas {
            display: block;
            background: linear-gradient(#0055ff, #001133);
        }
        #ui {
            position: absolute;
            top: 20px;
            left: 20px;
            color: white;
            font-size: 24px;
            pointer-events: none;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
    </style>
</head>
<body>
    <div id="ui">Score: 0</div>
    <canvas id="gameCanvas"></canvas>

canvas.width = window.innerWidth;
        canvas.height = window.innerHeight;

// Game Constants
        const GRAVITY = 0.8;
        const JUMP_FORCE = -15;
        const GROUND_Y = canvas.height - 100;
        const PLAYER_SIZE = 40;

let score = 0;
        let gameActive = true;
        let gameSpeed = 7;

const player = {
            x: 100,
            y: GROUND_Y - PLAYER_SIZE,
            vy: 0,
            width: PLAYER_SIZE,
            height: PLAYER_SIZE,
            rotation: 0,
            grounded: true
        };

const obstacles = [];

function spawnObstacle() {
            if (!gameActive) return;
            const size = 40;
            obstacles.push({
                x: canvas.width,
                y: GROUND_Y - size,
                width: size,
                height: size
            });
            
            // Randomize next spawn
            setTimeout(spawnObstacle, 1000 + Math.random() * 2000);
        }

function resetGame() {
            score = 0;
            gameSpeed = 7;
            player.y = GROUND_Y - PLAYER_SIZE;
            player.vy = 0;
            player.rotation = 0;
            obstacles.length = 0;
            gameActive = true;
            scoreElement.innerText = "Score: 0";
            requestAnimationFrame(update);
        }

window.addEventListener('keydown', (e) => {
            if (e.code === 'Space' || e.code === 'ArrowUp') jump();
        });

window.addEventListener('touchstart', jump);
        window.addEventListener('mousedown', jump);

function update() {
            if (!gameActive) return;

// Physics
            player.vy += GRAVITY;
            player.y += player.vy;

// Ground Collision
            if (player.y + player.height >= GROUND_Y) {
                player.y = GROUND_Y - player.height;
                player.vy = 0;
                player.grounded = true;
                // Snap rotation to 90deg increments
                player.rotation = Math.round(player.rotation / 90) * 90;
            } else {
                player.rotation += 5; // Rotate in air
            }

// Move Obstacles
            for (let i = obstacles.length - 1; i >= 0; i--) {
                obstacles[i].x -= gameSpeed;

// Collision Detection
                if (
                    player.x < obstacles[i].x + obstacles[i].width &&
                    player.x + player.width > obstacles[i].x &&
                    player.y < obstacles[i].y + obstacles[i].height &&
                    player.y + player.height > obstacles[i].y
                ) {
                    gameActive = false;
                    alert("Game Over! Score: " + score);
                    resetGame();
                    return;
                }

// Cleanup
                if (obstacles[i].x + obstacles[i].width < 0) {
                    obstacles.splice(i, 1);
                    score++;
                    scoreElement.innerText = "Score: " + score;
                    gameSpeed += 0.1;
                }
            }

draw();
            requestAnimationFrame(update);
        }

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

// Draw Ground
            ctx.fillStyle = '#111';
            ctx.fillRect(0, GROUND_Y, canvas.width, canvas.height - GROUND_Y);
            ctx.strokeStyle = '#00ffff';
            ctx.lineWidth = 4;
            ctx.beginPath();
            ctx.moveTo(0, GROUND_Y);
            ctx.lineTo(canvas.width, GROUND_Y);
            ctx.stroke();

// Draw Player
            ctx.save();
            ctx.translate(player.x + player.width / 2, player.y + player.height / 2);
            ctx.rotate(player.rotation * Math.PI / 180);
            ctx.fillStyle = '#00ff00';
            ctx.fillRect(-player.width / 2, -player.height / 2, player.width, player.height);
            ctx.strokeStyle = 'white';
            ctx.lineWidth = 2;
            ctx.strokeRect(-player.width / 2, -player.height / 2, player.width, player.height);
            // Eye
            ctx.fillStyle = 'black';
            ctx.fillRect(5, -10, 10, 10);
            ctx.restore();

// Draw Obstacles (Spikes)
            ctx.fillStyle = '#ff0055';
            obstacles.forEach(obs => {
                ctx.beginPath();
                ctx.moveTo(obs.x, obs.y + obs.height);
                ctx.lineTo(obs.x + obs.width / 2, obs.y);
                ctx.lineTo(obs.x + obs.width, obs.y + obs.height);
                ctx.closePath();
                ctx.fill();
                ctx.strokeStyle = 'white';
                ctx.stroke();
            });
        }

spawnObstacle();
        update();

window.onresize = () => {
            canvas.width = window.innerWidth;
            canvas.height = window.innerHeight;
        };
    </script>
</body>
</html>

CSS

Geometry Dash JavaScript Game Clone

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