===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,276 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Coin = Container.expand(function () {
+	var self = Container.call(this);
+	var coinGraphics = self.attachAsset('coin', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 8;
+	self.collected = false;
+	self.update = function () {
+		self.x -= self.speed;
+		coinGraphics.rotation += 0.1;
+	};
+	return self;
+});
+var Enemy = Container.expand(function () {
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.speed = 8;
+	self.moveDirection = 1;
+	self.moveRange = 100;
+	self.startY = 0;
+	self.update = function () {
+		self.x -= self.speed;
+		self.y += self.moveDirection * 2;
+		if (Math.abs(self.y - self.startY) > self.moveRange) {
+			self.moveDirection *= -1;
+		}
+	};
+	return self;
+});
+var Gap = Container.expand(function () {
+	var self = Container.call(this);
+	var gapGraphics = self.attachAsset('gap', {
+		anchorX: 0,
+		anchorY: 0
+	});
+	self.speed = 8;
+	self.update = function () {
+		self.x -= self.speed;
+	};
+	return self;
+});
+var Ground = Container.expand(function () {
+	var self = Container.call(this);
+	var groundGraphics = self.attachAsset('ground', {
+		anchorX: 0,
+		anchorY: 0
+	});
+	self.speed = 8;
+	self.update = function () {
+		self.x -= self.speed;
+	};
+	return self;
+});
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.velocityY = 0;
+	self.isGrounded = false;
+	self.jumpPower = -20;
+	self.gravity = 1.2;
+	self.groundY = 2400;
+	self.jump = function () {
+		if (self.isGrounded) {
+			self.velocityY = self.jumpPower;
+			self.isGrounded = false;
+			LK.getSound('jump').play();
+		}
+	};
+	self.update = function () {
+		self.velocityY += self.gravity;
+		self.y += self.velocityY;
+		if (self.y >= self.groundY) {
+			self.y = self.groundY;
+			self.velocityY = 0;
+			self.isGrounded = true;
+		}
+	};
+	return self;
+});
+var Spike = Container.expand(function () {
+	var self = Container.call(this);
+	var spikeGraphics = self.attachAsset('spike', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.speed = 8;
+	self.update = function () {
+		self.x -= self.speed;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87ceeb
+});
+
+/**** 
+* Game Code
+****/ 
+var player;
+var obstacles = [];
+var coins = [];
+var groundTiles = [];
+var gameSpeed = 8;
+var spawnTimer = 0;
+var coinSpawnTimer = 0;
+var speedIncreaseTimer = 0;
+var distance = 0;
+var coinScore = 0;
+// UI Elements
+var scoreText = new Text2('Score: 0', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+scoreText.anchor.set(0, 0);
+LK.gui.topLeft.addChild(scoreText);
+scoreText.x = 120;
+scoreText.y = 20;
+var distanceText = new Text2('Distance: 0m', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+distanceText.anchor.set(1, 0);
+LK.gui.topRight.addChild(distanceText);
+distanceText.x = -20;
+distanceText.y = 20;
+// Initialize player
+player = game.addChild(new Player());
+player.x = 300;
+player.y = 2400;
+// Initialize ground tiles
+for (var i = 0; i < 15; i++) {
+	var groundTile = game.addChild(new Ground());
+	groundTile.x = i * 200;
+	groundTile.y = 2400;
+	groundTiles.push(groundTile);
+}
+function spawnObstacle() {
+	var obstacleType = Math.floor(Math.random() * 3);
+	var obstacle;
+	switch (obstacleType) {
+		case 0:
+			// Spike
+			obstacle = new Spike();
+			obstacle.x = 2200;
+			obstacle.y = 2400;
+			break;
+		case 1:
+			// Gap
+			obstacle = new Gap();
+			obstacle.x = 2200;
+			obstacle.y = 2400;
+			break;
+		case 2:
+			// Enemy
+			obstacle = new Enemy();
+			obstacle.x = 2200;
+			obstacle.y = 2200;
+			obstacle.startY = obstacle.y;
+			break;
+	}
+	if (obstacle) {
+		obstacles.push(obstacle);
+		game.addChild(obstacle);
+	}
+}
+function spawnCoin() {
+	var coin = new Coin();
+	coin.x = 2200;
+	coin.y = 2000 + Math.random() * 300;
+	coins.push(coin);
+	game.addChild(coin);
+}
+function updateScore() {
+	var totalScore = Math.floor(distance / 10) + coinScore * 10;
+	scoreText.setText('Score: ' + totalScore);
+	distanceText.setText('Distance: ' + Math.floor(distance / 10) + 'm');
+	LK.setScore(totalScore);
+}
+function checkCollisions() {
+	// Check obstacle collisions
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obstacle = obstacles[i];
+		if (player.intersects(obstacle)) {
+			LK.effects.flashScreen(0xff0000, 500);
+			LK.showGameOver();
+			return;
+		}
+	}
+	// Check coin collisions
+	for (var j = coins.length - 1; j >= 0; j--) {
+		var coin = coins[j];
+		if (!coin.collected && player.intersects(coin)) {
+			coin.collected = true;
+			coinScore++;
+			LK.getSound('coin').play();
+			coin.alpha = 0;
+			tween(coin, {
+				scaleX: 2,
+				scaleY: 2
+			}, {
+				duration: 200
+			});
+		}
+	}
+}
+game.down = function (x, y, obj) {
+	player.jump();
+};
+game.update = function () {
+	distance += gameSpeed / 10;
+	// Update all objects
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obstacle = obstacles[i];
+		obstacle.speed = gameSpeed;
+		if (obstacle.x < -200) {
+			obstacle.destroy();
+			obstacles.splice(i, 1);
+		}
+	}
+	for (var j = coins.length - 1; j >= 0; j--) {
+		var coin = coins[j];
+		coin.speed = gameSpeed;
+		if (coin.x < -100) {
+			coin.destroy();
+			coins.splice(j, 1);
+		}
+	}
+	for (var k = 0; k < groundTiles.length; k++) {
+		var tile = groundTiles[k];
+		tile.speed = gameSpeed;
+		if (tile.x < -200) {
+			tile.x = tile.x + groundTiles.length * 200;
+		}
+	}
+	// Spawn obstacles
+	spawnTimer++;
+	if (spawnTimer > 80 - Math.min(gameSpeed * 2, 50)) {
+		spawnObstacle();
+		spawnTimer = 0;
+	}
+	// Spawn coins
+	coinSpawnTimer++;
+	if (coinSpawnTimer > 120) {
+		if (Math.random() < 0.7) {
+			spawnCoin();
+		}
+		coinSpawnTimer = 0;
+	}
+	// Increase speed over time
+	speedIncreaseTimer++;
+	if (speedIncreaseTimer > 300) {
+		gameSpeed += 0.5;
+		speedIncreaseTimer = 0;
+	}
+	checkCollisions();
+	updateScore();
+};
\ No newline at end of file