===================================================================
--- original.js
+++ change.js
@@ -1,13 +1,8 @@
 /**** 
-* Plugins
-****/ 
-var tween = LK.import("@upit/tween.v1");
-
-/**** 
 * Classes
 ****/ 
-// Player Car
+// Player's car class
 var PlayerCar = Container.expand(function () {
 	var self = Container.call(this);
 	var car = self.attachAsset('playerCar', {
 		anchorX: 0.5,
@@ -15,87 +10,63 @@
 	});
 	self.width = car.width;
 	self.height = car.height;
 	self.lane = 1; // 0: left, 1: center, 2: right
-	self.invincible = false;
-	self.invincibleTimer = 0;
+	self.lastX = 0;
+	self.lastY = 0;
 	self.update = function () {
-		// Invincibility timer
-		if (self.invincible) {
-			self.invincibleTimer--;
-			if (self.invincibleTimer <= 0) {
-				self.invincible = false;
-				car.alpha = 1;
-			}
-		}
+		self.lastX = self.x;
+		self.lastY = self.y;
 	};
-	// Flash effect for invincibility
-	self.setInvincible = function (duration) {
-		self.invincible = true;
-		self.invincibleTimer = duration;
-		car.alpha = 0.5;
-	};
 	return self;
 });
-// Police Car
+// Police car class
 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.speed = 18 + Math.random() * 8;
+	self.lastY = 0;
 	self.update = function () {
+		self.lastY = self.y;
 		self.y += self.speed;
 	};
 	return self;
 });
-// Powerup
-var Powerup = Container.expand(function () {
+// Power-up class
+var PowerUp = Container.expand(function () {
 	var self = Container.call(this);
-	var p = self.attachAsset('powerup', {
+	var pu = 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.width = pu.width;
+	self.height = pu.height;
+	self.speed = 22;
+	self.lastY = 0;
 	self.update = function () {
+		self.lastY = self.y;
 		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
+// Traffic car class
 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.speed = 20 + Math.random() * 10;
+	self.lastY = 0;
 	self.update = function () {
+		self.lastY = self.y;
 		self.y += self.speed;
 	};
 	return self;
 });
@@ -103,265 +74,173 @@
 /**** 
 * Initialize Game
 ****/ 
 var game = new LK.Game({
-	backgroundColor: 0x222222
+	backgroundColor: 0x000000
 });
 
 /**** 
 * Game Code
 ****/ 
-// Game constants
-// Car assets
-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;
-var distance;
-var lastLane;
-var gameSpeed;
-var policeSpawnTimer;
-var trafficSpawnTimer;
-var powerupSpawnTimer;
-var difficultyTimer;
-var dragStartX;
-var dragStartLane;
-var dragNode;
-// Reset function to initialize all game state variables and objects
-function resetGameState() {
-	policeCars = [];
-	trafficCars = [];
-	powerups = [];
-	roadLines = [];
-	score = 0;
-	distance = 0;
-	lastLane = 1;
-	gameSpeed = 24;
-	policeSpawnTimer = 0;
-	trafficSpawnTimer = 0;
-	powerupSpawnTimer = 0;
-	difficultyTimer = 0;
-	dragStartX = null;
-	dragStartLane = null;
-	dragNode = null;
+;
+// --- Car Chase Game Variables ---
+var playerCar;
+var policeCars = [];
+var trafficCars = [];
+var powerUps = [];
+var roadLines = [];
+var score = 0;
+var gameSpeed = 22;
+var laneCount = 3;
+var laneWidth = 410;
+var roadLeft = (2048 - laneCount * laneWidth) / 2 + laneWidth / 2;
+var roadRight = 2048 - roadLeft;
+var dragNode = null;
+var lastTouchX = 0;
+var scoreTxt;
+// --- Helper: Get lane X position ---
+function getLaneX(lane) {
+	return roadLeft + lane * laneWidth;
 }
-resetGameState();
-// Score display
-var scoreTxt = new Text2('0', {
+// --- Setup Player Car ---
+playerCar = new PlayerCar();
+playerCar.x = getLaneX(1);
+playerCar.y = 2732 - 400;
+game.addChild(playerCar);
+// --- Setup Score Text ---
+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();
+// --- Setup Road Lines ---
+for (var i = 0; i < 10; i++) {
+	var line = LK.getAsset('roadLine', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
 	line.x = 2048 / 2;
-	line.y = i * ROAD_LINE_SPACING;
-	line.speed = gameSpeed;
+	line.y = i * 300 + 100;
 	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
+// --- Touch Controls for Player Car ---
 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;
+	if (x > playerCar.x - playerCar.width / 2 && x < playerCar.x + playerCar.width / 2 && y > playerCar.y - playerCar.height / 2 && y < playerCar.y + playerCar.height / 2) {
+		dragNode = playerCar;
+		lastTouchX = x;
 	}
 };
 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
-			});
-		}
+	if (dragNode === playerCar) {
+		var dx = x - lastTouchX;
+		playerCar.x += dx;
+		// Clamp to road
+		if (playerCar.x < roadLeft) playerCar.x = roadLeft;
+		if (playerCar.x > roadRight) playerCar.x = roadRight;
+		lastTouchX = x;
 	}
 };
 game.up = function (x, y, obj) {
 	dragNode = null;
-	dragStartX = null;
-	dragStartLane = null;
 };
-// Main update loop
+// --- Main Game 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;
+		line.y += gameSpeed;
+		if (line.y > 2732 + 60) {
+			line.y -= 300 * roadLines.length;
 		}
 	}
-	// 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);
+	// Spawn traffic cars
+	if (LK.ticks % 45 === 0) {
+		var lane = Math.floor(Math.random() * laneCount);
+		var tcar = new TrafficCar();
+		tcar.x = getLaneX(lane);
+		tcar.y = -200;
+		trafficCars.push(tcar);
+		game.addChild(tcar);
+	}
+	// Spawn police cars
+	if (LK.ticks % 180 === 0) {
+		var lane = Math.floor(Math.random() * laneCount);
+		var pcar = new PoliceCar();
+		pcar.x = getLaneX(lane);
+		pcar.y = -220;
+		policeCars.push(pcar);
+		game.addChild(pcar);
+	}
+	// Spawn power-ups
+	if (LK.ticks % 300 === 0) {
+		var lane = Math.floor(Math.random() * laneCount);
+		var pu = new PowerUp();
+		pu.x = getLaneX(lane);
+		pu.y = -100;
+		powerUps.push(pu);
+		game.addChild(pu);
+	}
+	// Update player car
+	playerCar.update();
+	// Update and remove off-screen traffic cars
+	for (var i = trafficCars.length - 1; i >= 0; i--) {
+		var tcar = trafficCars[i];
+		tcar.update();
+		if (tcar.y > 2732 + 200) {
+			tcar.destroy();
+			trafficCars.splice(i, 1);
 			continue;
 		}
 		// Collision with player
-		if (p.intersects(player) && !player.invincible) {
-			LK.effects.flashScreen(0xff0000, 800);
+		if (tcar.intersects(playerCar)) {
+			LK.effects.flashScreen(0xff0000, 1000);
 			LK.showGameOver();
-			resetGameState();
 			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);
+	// Update and remove off-screen police cars
+	for (var i = policeCars.length - 1; i >= 0; i--) {
+		var pcar = policeCars[i];
+		pcar.update();
+		if (pcar.y > 2732 + 220) {
+			pcar.destroy();
+			policeCars.splice(i, 1);
 			continue;
 		}
 		// Collision with player
-		if (t.intersects(player) && !player.invincible) {
-			LK.effects.flashScreen(0xff0000, 800);
+		if (pcar.intersects(playerCar)) {
+			LK.effects.flashScreen(0xff0000, 1000);
 			LK.showGameOver();
-			resetGameState();
 			return;
 		}
 	}
-	// Move powerups
-	for (var i = powerups.length - 1; i >= 0; i--) {
-		var pu = powerups[i];
-		pu.speed = gameSpeed;
+	// Update and remove off-screen power-ups
+	for (var i = powerUps.length - 1; i >= 0; i--) {
+		var pu = powerUps[i];
 		pu.update();
-		if (pu.y > 2732 + 200) {
+		if (pu.y > 2732 + 100) {
 			pu.destroy();
-			powerups.splice(i, 1);
+			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);
+		// Collision with player
+		if (pu.intersects(playerCar)) {
+			score += 10;
 			scoreTxt.setText(score);
+			LK.effects.flashObject(playerCar, 0xffeb3b, 500);
 			pu.destroy();
-			powerups.splice(i, 1);
+			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);
+	// Score increases with distance
+	if (LK.ticks % 6 === 0) {
+		score += 1;
+		scoreTxt.setText(score);
 	}
-	// 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);
+	// Gradually increase game speed
+	if (LK.ticks % 180 === 0 && gameSpeed < 40) {
+		gameSpeed += 1;
 	}
-	// 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