/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
// Enemy Car (multiple types)
var EnemyCar = Container.expand(function () {
	var self = Container.call(this);
	// Randomly pick a type: 0 = normal, 1 = wide, 2 = fast, 3 = obstacle
	var type = Math.floor(Math.random() * 4);
	self.type = type;
	var assetId = 'enemyCar';
	var color = 0xe53935;
	var width = 180;
	var height = 320;
	if (type === 1) {
		// wide car
		width = 260;
		color = 0x8e24aa;
	} else if (type === 2) {
		// fast car
		color = 0x43a047;
	} else if (type === 3) {
		// obstacle (barrier)
		assetId = 'obstacle';
		width = 220;
		height = 120;
		color = 0xffb300;
	}
	var car = self.attachAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	car.width = width;
	car.height = height;
	car.tint = color;
	self.width = width;
	self.height = height;
	self.speed = 0;
	// For collision
	self.lane = 0;
	return self;
});
// Lane Mark
var LaneMark = Container.expand(function () {
	var self = Container.call(this);
	var mark = self.attachAsset('laneMark', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = mark.width;
	self.height = mark.height;
	self.speed = 0;
	return self;
});
// Player Car
var PlayerCar = Container.expand(function () {
	var self = Container.call(this);
	var car = self.attachAsset('playerCar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// For collision box, use car asset size
	self.width = car.width;
	self.height = car.height;
	// For touch drag
	self.isDragging = false;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222222
});

/**** 
* Game Code
****/ 
// Road background
// Car (player)
// Enemy car
// Fuel can
// Road lane
// Road background (gray)
var roadBg = LK.getAsset('roadBg', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
game.addChild(roadBg);
// Lane setup
var NUM_LANES = 4;
var LANE_WIDTH = 350;
var ROAD_WIDTH = NUM_LANES * LANE_WIDTH;
var ROAD_LEFT = (2048 - ROAD_WIDTH) / 2;
var ROAD_RIGHT = ROAD_LEFT + ROAD_WIDTH;
// Lane marks
var laneMarks = [];
for (var i = 1; i < NUM_LANES; i++) {
	for (var j = 0; j < 8; j++) {
		var mark = new LaneMark();
		mark.x = ROAD_LEFT + i * LANE_WIDTH;
		mark.y = j * 400;
		mark.speed = 0;
		laneMarks.push(mark);
		game.addChild(mark);
	}
}
// Player car
var player = new PlayerCar();
player.x = 2048 / 2;
player.y = 2732 - 400;
game.addChild(player);
// Score
var score = 0;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Game state
var enemyCars = [];
var speed = 22; // Initial speed (pixels per frame)
var ticksSinceLastEnemy = 0;
var gameOver = false;
// Touch controls
var dragStartX = 0;
var dragStartPlayerX = 0;
var dragActive = false;
// Touch area for left/right controls (full screen)
game.down = function (x, y, obj) {
	// Only allow drag if touch is on lower half of screen
	if (y > 1200) {
		dragActive = true;
		dragStartX = x;
		dragStartPlayerX = player.x;
	}
};
game.move = function (x, y, obj) {
	if (dragActive) {
		var dx = x - dragStartX;
		var newX = dragStartPlayerX + dx;
		// Clamp to road
		var minX = ROAD_LEFT + player.width / 2;
		var maxX = ROAD_RIGHT - player.width / 2;
		if (newX < minX) newX = minX;
		if (newX > maxX) newX = maxX;
		player.x = newX;
	}
};
game.up = function (x, y, obj) {
	dragActive = false;
};
// Helper: spawn enemy car
function spawnEnemyCar() {
	var enemy = new EnemyCar();
	// Random lane
	var lane = Math.floor(Math.random() * NUM_LANES);
	enemy.lane = lane;
	enemy.x = ROAD_LEFT + LANE_WIDTH / 2 + lane * LANE_WIDTH;
	enemy.y = -200;
	// Speed: base + random, vary by type
	if (enemy.type === 2) {
		// fast car
		enemy.speed = speed + 8 + Math.floor(Math.random() * 6);
	} else if (enemy.type === 1) {
		// wide car
		enemy.speed = speed - 2 + Math.floor(Math.random() * 3);
	} else if (enemy.type === 3) {
		// obstacle
		enemy.speed = speed - 4 + Math.floor(Math.random() * 2);
	} else {
		enemy.speed = speed + Math.floor(Math.random() * 6);
	}
	enemyCars.push(enemy);
	game.addChild(enemy);
}
// Helper: game over
function triggerGameOver() {
	if (!gameOver) {
		gameOver = true;
		LK.effects.flashScreen(0xff0000, 800);
		LK.showGameOver();
	}
}
// Main game loop
game.update = function () {
	if (gameOver) return;
	// Speed control: accelerate if holding, decelerate if not
	var minSpeed = 14;
	var maxSpeed = 44;
	var accel = 0.25;
	var decel = 0.4;
	if (dragActive) {
		if (speed < maxSpeed) speed += accel;
	} else {
		if (speed > minSpeed) speed -= decel;
		if (speed < minSpeed) speed = minSpeed;
	}
	// Move lane marks (simulate road movement)
	for (var i = 0; i < laneMarks.length; i++) {
		var mark = laneMarks[i];
		mark.y += speed;
		if (mark.y > 2732) {
			mark.y -= 3200;
		}
	}
	// Spawn enemy cars
	ticksSinceLastEnemy++;
	var enemyInterval = Math.max(18, 60 - Math.floor(score / 10)); // Faster as score increases
	if (ticksSinceLastEnemy >= enemyInterval) {
		spawnEnemyCar();
		ticksSinceLastEnemy = 0;
	}
	// Move enemy cars
	for (var i = enemyCars.length - 1; i >= 0; i--) {
		var enemy = enemyCars[i];
		enemy.y += enemy.speed;
		// Remove if off screen
		if (enemy.y > 2900) {
			enemy.destroy();
			enemyCars.splice(i, 1);
			// Score for passing car (not for obstacles)
			if (enemy.type !== 3) {
				score += 1;
				scoreTxt.setText(score);
			}
			// Increase max speed every 10 points
			if (score % 10 === 0 && maxSpeed < 60) {
				maxSpeed += 2;
			}
			continue;
		}
		// Collision with player
		if (enemy.intersects(player)) {
			triggerGameOver();
			return;
		}
	}
};
// Initial UI
scoreTxt.setText(score);

===================================================================
--- original.js
+++ change.js
@@ -29,10 +29,8 @@
 		width = 220;
 		height = 120;
 		color = 0xffb300;
 	}
-	// Dynamically create asset if needed
-	if (type === 3 && !LK.hasAsset('obstacle')) {}
 	var car = self.attachAsset(assetId, {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});