===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,206 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Obstacle = Container.expand(function (type) {
+	var self = Container.call(this);
+	var obstacleType = type || 'ground';
+	if (obstacleType === 'ground') {
+		var obstacleGraphics = self.attachAsset('groundObstacle', {
+			anchorX: 0.5,
+			anchorY: 1.0
+		});
+		self.height = 80;
+	} else {
+		var obstacleGraphics = self.attachAsset('airObstacle', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+		self.height = 40;
+	}
+	self.obstacleType = obstacleType;
+	self.speed = gameSpeed;
+	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.isJumping = false;
+	self.isDucking = false;
+	self.jumpVelocity = 0;
+	self.gravity = 1.2;
+	self.jumpPower = -18;
+	self.normalHeight = 80;
+	self.duckHeight = 40;
+	self.groundY = 0;
+	self.jump = function () {
+		if (!self.isJumping) {
+			self.isJumping = true;
+			self.jumpVelocity = self.jumpPower;
+			LK.getSound('jump').play();
+		}
+	};
+	self.startDuck = function () {
+		if (!self.isDucking && !self.isJumping) {
+			self.isDucking = true;
+			playerGraphics.height = self.duckHeight;
+			LK.getSound('duck').play();
+		}
+	};
+	self.stopDuck = function () {
+		if (self.isDucking) {
+			self.isDucking = false;
+			playerGraphics.height = self.normalHeight;
+		}
+	};
+	self.update = function () {
+		if (self.isJumping) {
+			self.jumpVelocity += self.gravity;
+			self.y += self.jumpVelocity;
+			if (self.y >= self.groundY) {
+				self.y = self.groundY;
+				self.isJumping = false;
+				self.jumpVelocity = 0;
+			}
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
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+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+var gameSpeed = 8;
+var speedIncrement = 0.01;
+var maxSpeed = 20;
+var groundY = 2732 - 200;
+var obstacles = [];
+var obstacleSpawnTimer = 0;
+var obstacleSpawnDelay = 90;
+var minSpawnDelay = 45;
+var distance = 0;
+var isGameRunning = true;
+var isPressed = false;
+// Create ground
+var ground = game.addChild(LK.getAsset('ground', {
+	anchorX: 0,
+	anchorY: 0,
+	x: 0,
+	y: groundY + 20
+}));
+// Create player
+var player = game.addChild(new Player());
+player.x = 300;
+player.y = groundY;
+player.groundY = groundY;
+// Create score display
+var scoreText = new Text2('0', {
+	size: 100,
+	fill: 0x000000
+});
+scoreText.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreText);
+// Create distance display
+var distanceText = new Text2('0m', {
+	size: 60,
+	fill: 0x333333
+});
+distanceText.anchor.set(1, 0);
+distanceText.x = -20;
+distanceText.y = 20;
+LK.gui.topRight.addChild(distanceText);
+function spawnObstacle() {
+	var obstacleType = Math.random() < 0.6 ? 'ground' : 'air';
+	var obstacle = new Obstacle(obstacleType);
+	obstacle.x = 2048 + 100;
+	if (obstacleType === 'ground') {
+		obstacle.y = groundY;
+	} else {
+		obstacle.y = groundY - 120;
+	}
+	obstacle.speed = gameSpeed;
+	obstacles.push(obstacle);
+	game.addChild(obstacle);
+}
+function checkCollisions() {
+	for (var i = 0; i < obstacles.length; i++) {
+		var obstacle = obstacles[i];
+		if (player.intersects(obstacle)) {
+			LK.getSound('hit').play();
+			isGameRunning = false;
+			LK.showGameOver();
+			return;
+		}
+	}
+}
+function updateObstacles() {
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obstacle = obstacles[i];
+		obstacle.speed = gameSpeed;
+		if (obstacle.x < -100) {
+			obstacle.destroy();
+			obstacles.splice(i, 1);
+			LK.setScore(LK.getScore() + 10);
+		}
+	}
+}
+function updateGameSpeed() {
+	if (gameSpeed < maxSpeed) {
+		gameSpeed += speedIncrement;
+	}
+	if (obstacleSpawnDelay > minSpawnDelay) {
+		obstacleSpawnDelay = Math.max(minSpawnDelay, 90 - distance / 100);
+	}
+}
+game.down = function (x, y, obj) {
+	if (isGameRunning) {
+		isPressed = true;
+		player.jump();
+	}
+};
+game.up = function (x, y, obj) {
+	isPressed = false;
+	if (isGameRunning) {
+		player.stopDuck();
+	}
+};
+game.update = function () {
+	if (!isGameRunning) return;
+	// Handle ducking
+	if (isPressed && !player.isJumping) {
+		player.startDuck();
+	} else if (!isPressed) {
+		player.stopDuck();
+	}
+	// Update distance and score
+	distance += gameSpeed * 0.1;
+	distanceText.setText(Math.floor(distance) + 'm');
+	scoreText.setText(LK.getScore());
+	// Spawn obstacles
+	obstacleSpawnTimer++;
+	if (obstacleSpawnTimer >= obstacleSpawnDelay) {
+		spawnObstacle();
+		obstacleSpawnTimer = 0;
+	}
+	// Update game elements
+	updateObstacles();
+	updateGameSpeed();
+	checkCollisions();
+};
\ No newline at end of file