===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,260 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+var storage = LK.import("@upit/storage.v1", {
+	bestScore: 0
+});
+
+/**** 
+* Classes
+****/ 
+// Player Car
+var Car = Container.expand(function () {
+	var self = Container.call(this);
+	var carAsset = self.attachAsset('car', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// For collision box, use the car asset's size
+	self.width = carAsset.width;
+	self.height = carAsset.height;
+	return self;
+});
+// Coin
+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;
+	return self;
+});
+// Obstacle
+var Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	var obsAsset = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = obsAsset.width;
+	self.height = obsAsset.height;
+	// For collision
+	return self;
+});
+// Road Stripe
+var Stripe = Container.expand(function () {
+	var self = Container.call(this);
+	var stripeAsset = self.attachAsset('stripe', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = stripeAsset.width;
+	self.height = stripeAsset.height;
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x222222
+});
+
+/**** 
+* Game Code
+****/ 
+// Road stripes
+// Coin
+// Obstacle
+// Car (player)
+// Game area
+var GAME_WIDTH = 2048;
+var GAME_HEIGHT = 2732;
+var ROAD_WIDTH = 1200;
+var ROAD_X = (GAME_WIDTH - ROAD_WIDTH) / 2;
+var ROAD_Y = 0;
+var ROAD_HEIGHT = GAME_HEIGHT;
+// Player car
+var car = new Car();
+car.x = GAME_WIDTH / 2;
+car.y = GAME_HEIGHT - 500;
+game.addChild(car);
+// Road stripes
+var stripes = [];
+var stripeSpacing = 400;
+for (var i = 0; i < 8; i++) {
+	var stripe = new Stripe();
+	stripe.x = GAME_WIDTH / 2;
+	stripe.y = i * stripeSpacing + 200;
+	stripes.push(stripe);
+	game.addChild(stripe);
+}
+// Obstacles and coins
+var obstacles = [];
+var coins = [];
+// Score
+var score = 0;
+var scoreTxt = new Text2('0', {
+	size: 120,
+	fill: "#fff"
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Best score
+var bestScore = storage.bestScore || 0;
+var bestScoreTxt = new Text2('Best: ' + bestScore, {
+	size: 60,
+	fill: "#fff"
+});
+bestScoreTxt.anchor.set(0.5, 0);
+bestScoreTxt.y = 120;
+LK.gui.top.addChild(bestScoreTxt);
+// Game speed
+var baseSpeed = 18;
+var speed = baseSpeed;
+var speedIncreaseEvery = 600; // ticks
+var maxSpeed = 48;
+// Dragging
+var dragCar = false;
+var dragOffsetX = 0;
+// Touch controls
+function clamp(val, min, max) {
+	return val < min ? min : val > max ? max : val;
+}
+function handleMove(x, y, obj) {
+	if (dragCar) {
+		// Clamp car within road
+		var minX = ROAD_X + car.width / 2 + 20;
+		var maxX = ROAD_X + ROAD_WIDTH - car.width / 2 - 20;
+		car.x = clamp(x - dragOffsetX, minX, maxX);
+	}
+}
+game.move = handleMove;
+game.down = function (x, y, obj) {
+	// Only start drag if touch is on car
+	var local = car.toLocal(game.toGlobal({
+		x: x,
+		y: y
+	}));
+	if (local.x >= -car.width / 2 && local.x <= car.width / 2 && local.y >= -car.height / 2 && local.y <= car.height / 2) {
+		dragCar = true;
+		dragOffsetX = x - car.x;
+	}
+};
+game.up = function (x, y, obj) {
+	dragCar = false;
+};
+// Spawning
+var obstacleTimer = 0;
+var coinTimer = 0;
+function spawnObstacle() {
+	var obs = new Obstacle();
+	// Random lane
+	var lanes = 4;
+	var laneWidth = ROAD_WIDTH / lanes;
+	var lane = Math.floor(Math.random() * lanes);
+	obs.x = ROAD_X + laneWidth * (lane + 0.5);
+	obs.y = -obs.height;
+	obstacles.push(obs);
+	game.addChild(obs);
+}
+function spawnCoin() {
+	var coin = new Coin();
+	var lanes = 4;
+	var laneWidth = ROAD_WIDTH / lanes;
+	var lane = Math.floor(Math.random() * lanes);
+	coin.x = ROAD_X + laneWidth * (lane + 0.5);
+	coin.y = -coin.height;
+	coins.push(coin);
+	game.addChild(coin);
+}
+// Main update loop
+game.update = function () {
+	// Speed up over time
+	if (LK.ticks % speedIncreaseEvery === 0 && speed < maxSpeed) {
+		speed += 2;
+	}
+	// Move stripes
+	for (var i = 0; i < stripes.length; i++) {
+		stripes[i].y += speed;
+		if (stripes[i].y > GAME_HEIGHT + stripes[i].height / 2) {
+			stripes[i].y -= stripeSpacing * stripes.length;
+		}
+	}
+	// Spawn obstacles
+	obstacleTimer += 1;
+	if (obstacleTimer > 40 + Math.floor(60 * baseSpeed / speed)) {
+		spawnObstacle();
+		obstacleTimer = 0;
+	}
+	// Spawn coins
+	coinTimer += 1;
+	if (coinTimer > 90 + Math.floor(120 * baseSpeed / speed)) {
+		spawnCoin();
+		coinTimer = 0;
+	}
+	// Move obstacles
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obs = obstacles[i];
+		obs.y += speed;
+		// Remove if off screen
+		if (obs.y - obs.height / 2 > GAME_HEIGHT + 100) {
+			obs.destroy();
+			obstacles.splice(i, 1);
+			continue;
+		}
+		// Collision with car
+		if (car.intersects(obs)) {
+			// Flash and game over
+			LK.effects.flashScreen(0xff0000, 800);
+			if (score > bestScore) {
+				storage.bestScore = score;
+			}
+			LK.showGameOver();
+			return;
+		}
+	}
+	// Move coins
+	for (var i = coins.length - 1; i >= 0; i--) {
+		var coin = coins[i];
+		coin.y += speed;
+		// Remove if off screen
+		if (coin.y - coin.height / 2 > GAME_HEIGHT + 100) {
+			coin.destroy();
+			coins.splice(i, 1);
+			continue;
+		}
+		// Collect coin
+		if (car.intersects(coin)) {
+			score += 1;
+			scoreTxt.setText(score);
+			if (score > bestScore) {
+				bestScore = score;
+				bestScoreTxt.setText('Best: ' + bestScore);
+				storage.bestScore = bestScore;
+			}
+			// Animate coin
+			tween(coin, {
+				scaleX: 1.5,
+				scaleY: 1.5,
+				alpha: 0
+			}, {
+				duration: 200,
+				easing: tween.easeOut,
+				onFinish: function onFinish() {
+					coin.destroy();
+				}
+			});
+			coins.splice(i, 1);
+			continue;
+		}
+	}
+};
+// Reset score on new game
+score = 0;
+scoreTxt.setText(score);
+bestScore = storage.bestScore || 0;
+bestScoreTxt.setText('Best: ' + bestScore);
\ No newline at end of file