===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,346 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Player Car
+var PlayerCar = Container.expand(function () {
+	var self = Container.call(this);
+	var car = self.attachAsset('playerCar', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = car.width;
+	self.height = car.height;
+	self.lane = 1; // 0: left, 1: center, 2: right
+	self.invincible = false;
+	self.invincibleTimer = 0;
+	self.update = function () {
+		// Invincibility timer
+		if (self.invincible) {
+			self.invincibleTimer--;
+			if (self.invincibleTimer <= 0) {
+				self.invincible = false;
+				car.alpha = 1;
+			}
+		}
+	};
+	// Flash effect for invincibility
+	self.setInvincible = function (duration) {
+		self.invincible = true;
+		self.invincibleTimer = duration;
+		car.alpha = 0.5;
+	};
+	return self;
+});
+// Police Car
+var PoliceCar = Container.expand(function () {
+	var self = Container.call(this);
+	var car = self.attachAsset('policeCar', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = car.width;
+	self.height = car.height;
+	self.speed = 0;
+	self.lane = 1;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+// Powerup
+var Powerup = Container.expand(function () {
+	var self = Container.call(this);
+	var p = self.attachAsset('powerup', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = p.width;
+	self.height = p.height;
+	self.speed = 0;
+	self.type = 'invincible'; // Only one type for MVP
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+// Road Line
+var RoadLine = Container.expand(function () {
+	var self = Container.call(this);
+	var line = self.attachAsset('roadLine', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = line.width;
+	self.height = line.height;
+	self.speed = 0;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+// Traffic Car
+var TrafficCar = Container.expand(function () {
+	var self = Container.call(this);
+	var car = self.attachAsset('trafficCar', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = car.width;
+	self.height = car.height;
+	self.speed = 0;
+	self.lane = 1;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x222222
+});
+
+/**** 
+* Game Code
+****/ 
+// Car assets
+// Game constants
+var ROAD_WIDTH = 1200;
+var ROAD_LEFT = (2048 - ROAD_WIDTH) / 2;
+var ROAD_RIGHT = ROAD_LEFT + ROAD_WIDTH;
+var LANE_COUNT = 3;
+var LANE_WIDTH = ROAD_WIDTH / LANE_COUNT;
+var PLAYER_Y = 2732 - 400;
+var SPAWN_TOP = -300;
+var ROAD_LINE_SPACING = 300;
+var ROAD_LINE_COUNT = Math.ceil(2732 / ROAD_LINE_SPACING) + 2;
+// Game state
+var player;
+var policeCars = [];
+var trafficCars = [];
+var powerups = [];
+var roadLines = [];
+var score = 0;
+var distance = 0;
+var lastLane = 1;
+var gameSpeed = 24;
+var policeSpawnTimer = 0;
+var trafficSpawnTimer = 0;
+var powerupSpawnTimer = 0;
+var difficultyTimer = 0;
+var dragStartX = null;
+var dragStartLane = null;
+var dragNode = null;
+// Score display
+var scoreTxt = new Text2('0', {
+	size: 120,
+	fill: "#fff"
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Distance display
+var distTxt = new Text2('0 m', {
+	size: 60,
+	fill: "#fff"
+});
+distTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(distTxt);
+distTxt.y = 130;
+// Helper: get lane center X
+function laneToX(lane) {
+	return ROAD_LEFT + LANE_WIDTH * (lane + 0.5);
+}
+// Helper: pick random lane
+function randomLane() {
+	return Math.floor(Math.random() * LANE_COUNT);
+}
+// Helper: clamp lane
+function clampLane(lane) {
+	if (lane < 0) return 0;
+	if (lane >= LANE_COUNT) return LANE_COUNT - 1;
+	return lane;
+}
+// Create road lines
+for (var i = 0; i < ROAD_LINE_COUNT; i++) {
+	var line = new RoadLine();
+	line.x = 2048 / 2;
+	line.y = i * ROAD_LINE_SPACING;
+	line.speed = gameSpeed;
+	roadLines.push(line);
+	game.addChild(line);
+}
+// Create player
+player = new PlayerCar();
+player.lane = 1;
+player.x = laneToX(player.lane);
+player.y = PLAYER_Y;
+game.addChild(player);
+// Touch controls: drag to steer
+game.down = function (x, y, obj) {
+	// Only start drag if touch is on lower half of screen
+	if (y > 1366) {
+		dragStartX = x;
+		dragStartLane = player.lane;
+		dragNode = player;
+	}
+};
+game.move = function (x, y, obj) {
+	if (dragNode === player && dragStartX !== null) {
+		var dx = x - dragStartX;
+		var laneDelta = Math.round(dx / LANE_WIDTH);
+		var newLane = clampLane(dragStartLane + laneDelta);
+		if (newLane !== player.lane) {
+			player.lane = newLane;
+			// Animate car to new lane
+			tween.stop(player, {
+				x: true
+			});
+			tween(player, {
+				x: laneToX(player.lane)
+			}, {
+				duration: 120,
+				easing: tween.cubicOut
+			});
+		}
+	}
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
+	dragStartX = null;
+	dragStartLane = null;
+};
+// Main update loop
+game.update = function () {
+	// Increase difficulty over time
+	difficultyTimer++;
+	if (difficultyTimer % 600 === 0 && gameSpeed < 40) {
+		gameSpeed += 2;
+	}
+	// Move road lines
+	for (var i = 0; i < roadLines.length; i++) {
+		var line = roadLines[i];
+		line.speed = gameSpeed;
+		line.update();
+		if (line.y > 2732 + 100) {
+			line.y -= ROAD_LINE_COUNT * ROAD_LINE_SPACING;
+		}
+	}
+	// Update player
+	player.update();
+	// Move police cars
+	for (var i = policeCars.length - 1; i >= 0; i--) {
+		var p = policeCars[i];
+		p.speed = gameSpeed + 4;
+		p.update();
+		// Remove if off screen
+		if (p.y > 2732 + 300) {
+			p.destroy();
+			policeCars.splice(i, 1);
+			continue;
+		}
+		// Collision with player
+		if (p.intersects(player) && !player.invincible) {
+			LK.effects.flashScreen(0xff0000, 800);
+			LK.showGameOver();
+			return;
+		}
+	}
+	// Move traffic cars
+	for (var i = trafficCars.length - 1; i >= 0; i--) {
+		var t = trafficCars[i];
+		t.speed = gameSpeed;
+		t.update();
+		if (t.y > 2732 + 300) {
+			t.destroy();
+			trafficCars.splice(i, 1);
+			continue;
+		}
+		// Collision with player
+		if (t.intersects(player) && !player.invincible) {
+			LK.effects.flashScreen(0xff0000, 800);
+			LK.showGameOver();
+			return;
+		}
+	}
+	// Move powerups
+	for (var i = powerups.length - 1; i >= 0; i--) {
+		var pu = powerups[i];
+		pu.speed = gameSpeed;
+		pu.update();
+		if (pu.y > 2732 + 200) {
+			pu.destroy();
+			powerups.splice(i, 1);
+			continue;
+		}
+		// Pickup
+		if (pu.intersects(player)) {
+			if (pu.type === 'invincible') {
+				player.setInvincible(180); // 3 seconds at 60fps
+			}
+			score += 100;
+			LK.setScore(score);
+			scoreTxt.setText(score);
+			pu.destroy();
+			powerups.splice(i, 1);
+			continue;
+		}
+	}
+	// Spawn police car
+	policeSpawnTimer--;
+	if (policeSpawnTimer <= 0) {
+		var lane = randomLane();
+		// Don't spawn in same lane as last police
+		if (policeCars.length > 0 && policeCars[policeCars.length - 1].lane === lane) {
+			lane = clampLane((lane + 1) % LANE_COUNT);
+		}
+		var p = new PoliceCar();
+		p.lane = lane;
+		p.x = laneToX(lane);
+		p.y = SPAWN_TOP;
+		policeCars.push(p);
+		game.addChild(p);
+		policeSpawnTimer = Math.max(90, 240 - Math.floor(distance / 1000) * 10);
+	}
+	// Spawn traffic car
+	trafficSpawnTimer--;
+	if (trafficSpawnTimer <= 0) {
+		var lane = randomLane();
+		// Avoid spawning on player
+		if (lane === player.lane) {
+			lane = clampLane((lane + 1) % LANE_COUNT);
+		}
+		var t = new TrafficCar();
+		t.lane = lane;
+		t.x = laneToX(lane);
+		t.y = SPAWN_TOP - 200;
+		trafficCars.push(t);
+		game.addChild(t);
+		trafficSpawnTimer = Math.max(40, 120 - Math.floor(distance / 1000) * 5);
+	}
+	// Spawn powerup
+	powerupSpawnTimer--;
+	if (powerupSpawnTimer <= 0) {
+		var lane = randomLane();
+		var pu = new Powerup();
+		pu.x = laneToX(lane);
+		pu.y = SPAWN_TOP - 400;
+		powerups.push(pu);
+		game.addChild(pu);
+		powerupSpawnTimer = 600 + Math.floor(Math.random() * 600);
+	}
+	// Update score and distance
+	distance += gameSpeed;
+	distTxt.setText(Math.floor(distance / 10) + " m");
+	var newScore = Math.floor(distance / 10) + score;
+	if (newScore !== LK.getScore()) {
+		LK.setScore(newScore);
+		scoreTxt.setText(LK.getScore());
+	}
+};
\ No newline at end of file