===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,237 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Coin class: collectible
+var Coin = Container.expand(function () {
+	var self = Container.call(this);
+	var coinAsset = self.attachAsset('coin', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = coinAsset.width;
+	self.height = coinAsset.height;
+	self.lane = 1; // will be set on spawn
+	self.speed = 16; // will be set by game for difficulty
+	self.update = function () {
+		self.y += self.speed;
+		// Optional: spin effect
+		self.rotation += 0.15;
+	};
+	return self;
+});
+// Obstacle class: cracks, snow piles, ice blocks
+var Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	// Randomly pick obstacle type
+	var type = Math.floor(Math.random() * 3); // 0: crack, 1: snow, 2: block
+	var assetId = type === 0 ? 'crack' : type === 1 ? 'snow' : 'block';
+	var obstacleAsset = self.attachAsset(assetId, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.type = assetId;
+	self.width = obstacleAsset.width;
+	self.height = obstacleAsset.height;
+	self.lane = 1; // will be set on spawn
+	self.speed = 16; // will be set by game for difficulty
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+// Player class: the sliding character
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	// Attach player asset (blue ellipse for ice runner)
+	var playerAsset = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Set up initial properties
+	self.width = playerAsset.width;
+	self.height = playerAsset.height;
+	self.lane = 1; // 0: left, 1: center, 2: right
+	// For smooth lane transitions
+	self.targetX = 0;
+	// Update method: smoothly move to targetX
+	self.update = function () {
+		// Smoothly move towards targetX
+		self.x += (self.targetX - self.x) * 0.25;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x99d6f9 // Light blue for icy background
+});
+
+/**** 
+* Game Code
+****/ 
+// Tween plugin for smooth movement and animations
+// --- Lane setup ---
+var laneCount = 3;
+var laneWidth = 400; // Each lane is 400px wide
+var laneCenters = [2048 / 2 - laneWidth,
+// left
+2048 / 2,
+// center
+2048 / 2 + laneWidth // right
+];
+// --- Player setup ---
+var player = new Player();
+player.y = 2732 - 400; // Near bottom
+player.lane = 1;
+player.x = laneCenters[player.lane];
+player.targetX = player.x;
+game.addChild(player);
+// --- Score and GUI ---
+var score = 0;
+var scoreTxt = new Text2('0', {
+	size: 120,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// --- Coin counter ---
+var coinCount = 0;
+var coinTxt = new Text2('0', {
+	size: 90,
+	fill: 0xFFE066
+});
+coinTxt.anchor.set(0.5, 0);
+LK.gui.topRight.addChild(coinTxt);
+// --- Game state ---
+var obstacles = [];
+var coins = [];
+var gameSpeed = 16; // Initial speed
+var ticksSinceLastObstacle = 0;
+var ticksSinceLastCoin = 0;
+var obstacleInterval = 60; // Frames between obstacles
+var coinInterval = 90; // Frames between coins
+var isDragging = false;
+var dragStartX = 0;
+var dragStartLane = 1;
+// --- Asset initialization (shapes) ---
+// --- Touch/drag controls ---
+game.down = function (x, y, obj) {
+	// Only start drag if touch is on/near player
+	var dx = x - player.x;
+	var dy = y - player.y;
+	var dist = Math.sqrt(dx * dx + dy * dy);
+	if (dist < 200) {
+		isDragging = true;
+		dragStartX = x;
+		dragStartLane = player.lane;
+	}
+};
+game.move = function (x, y, obj) {
+	if (!isDragging) return;
+	// Calculate drag offset
+	var dx = x - dragStartX;
+	// If drag exceeds half lane width, move lane
+	var laneDelta = 0;
+	if (dx > laneWidth / 2) laneDelta = 1;
+	if (dx < -laneWidth / 2) laneDelta = -1;
+	var newLane = dragStartLane + laneDelta;
+	if (newLane < 0) newLane = 0;
+	if (newLane > 2) newLane = 2;
+	if (newLane !== player.lane) {
+		player.lane = newLane;
+		player.targetX = laneCenters[player.lane];
+	}
+};
+game.up = function (x, y, obj) {
+	isDragging = false;
+};
+// --- Main game update loop ---
+game.update = function () {
+	// Increase difficulty over time
+	if (LK.ticks % 180 === 0 && gameSpeed < 40) {
+		gameSpeed += 1;
+		if (obstacleInterval > 30) obstacleInterval -= 2;
+		if (coinInterval > 50) coinInterval -= 2;
+	}
+	// Player update (smooth lane movement)
+	player.update();
+	// --- Spawn obstacles ---
+	ticksSinceLastObstacle++;
+	if (ticksSinceLastObstacle >= obstacleInterval) {
+		ticksSinceLastObstacle = 0;
+		var obs = new Obstacle();
+		obs.lane = Math.floor(Math.random() * laneCount);
+		obs.x = laneCenters[obs.lane];
+		obs.y = -120;
+		obs.speed = gameSpeed;
+		obstacles.push(obs);
+		game.addChild(obs);
+	}
+	// --- Spawn coins ---
+	ticksSinceLastCoin++;
+	if (ticksSinceLastCoin >= coinInterval) {
+		ticksSinceLastCoin = 0;
+		var coin = new Coin();
+		coin.lane = Math.floor(Math.random() * laneCount);
+		coin.x = laneCenters[coin.lane];
+		coin.y = -100;
+		coin.speed = gameSpeed;
+		coins.push(coin);
+		game.addChild(coin);
+	}
+	// --- Update obstacles ---
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obs = obstacles[i];
+		obs.update();
+		// Remove if off screen
+		if (obs.y > 2732 + 200) {
+			obs.destroy();
+			obstacles.splice(i, 1);
+			continue;
+		}
+		// Collision with player
+		if (obs.lane === player.lane) {
+			var dy = Math.abs(obs.y - player.y);
+			if (dy < obs.height / 2 + player.height / 2 - 30) {
+				// Game over
+				LK.effects.flashScreen(0xff0000, 800);
+				LK.showGameOver();
+				return;
+			}
+		}
+	}
+	// --- Update coins ---
+	for (var j = coins.length - 1; j >= 0; j--) {
+		var coin = coins[j];
+		coin.update();
+		// Remove if off screen
+		if (coin.y > 2732 + 120) {
+			coin.destroy();
+			coins.splice(j, 1);
+			continue;
+		}
+		// Collect coin
+		if (coin.lane === player.lane) {
+			var dy = Math.abs(coin.y - player.y);
+			if (dy < coin.height / 2 + player.height / 2 - 40) {
+				coinCount += 1;
+				coinTxt.setText(coinCount);
+				coin.destroy();
+				coins.splice(j, 1);
+				continue;
+			}
+		}
+	}
+	// --- Score increases with time survived ---
+	if (LK.ticks % 6 === 0) {
+		score += 1;
+		scoreTxt.setText(score);
+	}
+};
\ No newline at end of file