===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,228 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var CeilingSegment = Container.expand(function () {
+	var self = Container.call(this);
+	var ceilingGraphics = self.attachAsset('ceiling', {
+		anchorX: 0,
+		anchorY: 1
+	});
+	self.speed = -8;
+	self.update = function () {
+		self.x += self.speed;
+	};
+	return self;
+});
+var GroundSegment = 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 Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	var obstacleGraphics = self.attachAsset('spike', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	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: 0.5
+	});
+	self.velocityY = 0;
+	self.gravity = 0.8;
+	self.jumpPower = -16;
+	self.isGrounded = false;
+	self.groundY = 2400;
+	self.jump = function () {
+		if (self.isGrounded) {
+			self.velocityY = self.jumpPower;
+			self.isGrounded = false;
+			LK.getSound('jump').play();
+		}
+	};
+	self.update = function () {
+		// Apply gravity
+		self.velocityY += self.gravity;
+		self.y += self.velocityY;
+		// Ground collision
+		if (self.y >= self.groundY) {
+			self.y = self.groundY;
+			self.velocityY = 0;
+			self.isGrounded = true;
+		}
+		// Ceiling collision
+		if (self.y <= 200) {
+			self.y = 200;
+			self.velocityY = 0;
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
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+	backgroundColor: 0x2c1810
+});
+
+/**** 
+* Game Code
+****/ 
+var player;
+var obstacles = [];
+var groundSegments = [];
+var ceilingSegments = [];
+var gameSpeed = 8;
+var obstacleSpawnTimer = 0;
+var groundSpawnTimer = 0;
+var ceilingSpawnTimer = 0;
+var distance = 0;
+var isGameRunning = true;
+// Score display
+var scoreTxt = new Text2('Distance: 0', {
+	size: 80,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Create player
+player = game.addChild(new Player());
+player.x = 400;
+player.y = 2400;
+// Initialize ground segments
+for (var i = 0; i < 15; i++) {
+	var groundSeg = new GroundSegment();
+	groundSeg.x = i * 200;
+	groundSeg.y = 2500;
+	groundSegments.push(groundSeg);
+	game.addChild(groundSeg);
+}
+// Initialize ceiling segments
+for (var i = 0; i < 15; i++) {
+	var ceilingSeg = new CeilingSegment();
+	ceilingSeg.x = i * 200;
+	ceilingSeg.y = 100;
+	ceilingSegments.push(ceilingSeg);
+	game.addChild(ceilingSeg);
+}
+function spawnObstacle() {
+	var obstacle = new Obstacle();
+	obstacle.x = 2200;
+	obstacle.y = 2500;
+	obstacles.push(obstacle);
+	game.addChild(obstacle);
+}
+function spawnGroundSegment() {
+	var groundSeg = new GroundSegment();
+	groundSeg.x = 2200;
+	groundSeg.y = 2500;
+	groundSegments.push(groundSeg);
+	game.addChild(groundSeg);
+}
+function spawnCeilingSegment() {
+	var ceilingSeg = new CeilingSegment();
+	ceilingSeg.x = 2200;
+	ceilingSeg.y = 100;
+	ceilingSegments.push(ceilingSeg);
+	game.addChild(ceilingSeg);
+}
+function resetGame() {
+	isGameRunning = false;
+	LK.getSound('death').play();
+	LK.effects.flashScreen(0xff0000, 500);
+	LK.setTimeout(function () {
+		LK.showGameOver();
+	}, 500);
+}
+function checkCollisions() {
+	if (!isGameRunning) return;
+	// Check obstacle collisions
+	for (var i = 0; i < obstacles.length; i++) {
+		var obstacle = obstacles[i];
+		if (player.intersects(obstacle)) {
+			resetGame();
+			return;
+		}
+	}
+}
+game.down = function (x, y, obj) {
+	if (isGameRunning) {
+		player.jump();
+	}
+};
+game.update = function () {
+	if (!isGameRunning) return;
+	// Update distance
+	distance += gameSpeed;
+	LK.setScore(Math.floor(distance / 10));
+	scoreTxt.setText('Distance: ' + Math.floor(distance / 10));
+	// Spawn obstacles
+	obstacleSpawnTimer++;
+	if (obstacleSpawnTimer >= 90) {
+		spawnObstacle();
+		obstacleSpawnTimer = 0;
+	}
+	// Spawn ground segments
+	groundSpawnTimer++;
+	if (groundSpawnTimer >= 25) {
+		spawnGroundSegment();
+		groundSpawnTimer = 0;
+	}
+	// Spawn ceiling segments
+	ceilingSpawnTimer++;
+	if (ceilingSpawnTimer >= 25) {
+		spawnCeilingSegment();
+		ceilingSpawnTimer = 0;
+	}
+	// Remove off-screen obstacles
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obstacle = obstacles[i];
+		if (obstacle.x < -100) {
+			obstacle.destroy();
+			obstacles.splice(i, 1);
+		}
+	}
+	// Remove off-screen ground segments
+	for (var i = groundSegments.length - 1; i >= 0; i--) {
+		var groundSeg = groundSegments[i];
+		if (groundSeg.x < -300) {
+			groundSeg.destroy();
+			groundSegments.splice(i, 1);
+		}
+	}
+	// Remove off-screen ceiling segments
+	for (var i = ceilingSegments.length - 1; i >= 0; i--) {
+		var ceilingSeg = ceilingSegments[i];
+		if (ceilingSeg.x < -300) {
+			ceilingSeg.destroy();
+			ceilingSegments.splice(i, 1);
+		}
+	}
+	// Check collisions
+	checkCollisions();
+	// Increase difficulty over time
+	if (LK.ticks % 600 === 0 && gameSpeed < 12) {
+		gameSpeed += 0.5;
+	}
+};
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