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

/**** 
* Classes
****/ 
var EnemyCar = Container.expand(function (carType) {
	var self = Container.call(this);
	var assetId = carType || 'enemyCar1';
	var carGraphics = self.attachAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.lane = 0;
	self.update = function () {
		self.speed = 8 * gameSpeed;
		self.y += self.speed;
	};
	return self;
});
var PlayerCar = Container.expand(function () {
	var self = Container.call(this);
	var carGraphics = self.attachAsset('playerCar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.targetLane = 1;
	self.currentLane = 1;
	self.laneWidth = 400;
	self.moveSpeed = 0.15;
	self.update = function () {
		var targetX = self.getLaneX(self.targetLane);
		var diff = targetX - self.x;
		var adjustedMoveSpeed = self.moveSpeed * (1 + (gameSpeed - 1) * 0.5);
		if (Math.abs(diff) > 5) {
			self.x += diff * adjustedMoveSpeed;
		} else {
			self.x = targetX;
			self.currentLane = self.targetLane;
		}
	};
	self.getLaneX = function (lane) {
		return 424 + lane * self.laneWidth;
	};
	self.switchLane = function (direction) {
		var newLane = self.targetLane + direction;
		if (newLane >= 0 && newLane <= 3) {
			self.targetLane = newLane;
		}
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('powerUp', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.rotationSpeed = 0.1;
	self.update = function () {
		self.y += self.speed;
		powerUpGraphics.rotation += self.rotationSpeed;
	};
	return self;
});
var RoadLine = Container.expand(function () {
	var self = Container.call(this);
	var lineGraphics = self.attachAsset('roadLine', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2c3e50
});

/**** 
* Game Code
****/ 
var playerCar = game.addChild(new PlayerCar());
playerCar.x = 424 + 400; // Lane 1
playerCar.y = 2200;
var enemyCars = [];
var powerUps = [];
var roadLines = [];
var gameSpeed = 1;
var spawnTimer = 0;
var spawnRate = 120;
var lineSpawnTimer = 0;
var powerUpSpawnTimer = 0;
var distanceTraveled = 0;
// Create initial road lines
for (var i = 0; i < 20; i++) {
	for (var lane = 0; lane < 4; lane++) {
		var line = game.addChild(new RoadLine());
		line.x = 624 + lane * 400; // Between lanes
		line.y = i * 150 - 200;
		roadLines.push(line);
	}
}
// UI Elements
var scoreTxt = new Text2('Distance: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var speedTxt = new Text2('Speed: 1x', {
	size: 60,
	fill: 0xFFFFFF
});
speedTxt.anchor.set(1, 0);
speedTxt.x = -20;
speedTxt.y = 100;
LK.gui.topRight.addChild(speedTxt);
// Touch controls
var touchStartX = 0;
var touchStartTime = 0;
game.down = function (x, y, obj) {
	touchStartX = x;
	touchStartTime = LK.ticks;
};
game.up = function (x, y, obj) {
	var touchEndX = x;
	var swipeDistance = touchEndX - touchStartX;
	var touchDuration = LK.ticks - touchStartTime;
	// Detect swipe or tap
	if (Math.abs(swipeDistance) > 100 && touchDuration < 30) {
		// Swipe detected
		if (swipeDistance > 0) {
			playerCar.switchLane(1); // Swipe right
		} else {
			playerCar.switchLane(-1); // Swipe left
		}
	} else if (touchDuration < 15) {
		// Quick tap - determine direction based on screen side
		if (x > 1024) {
			playerCar.switchLane(1); // Right side tap
		} else {
			playerCar.switchLane(-1); // Left side tap
		}
	}
};
function spawnEnemyCar() {
	var lane = Math.floor(Math.random() * 4);
	var carTypes = ['enemyCar1', 'enemyCar2', 'enemyCar3'];
	var carType = carTypes[Math.floor(Math.random() * carTypes.length)];
	var enemy = game.addChild(new EnemyCar(carType));
	enemy.x = 424 + lane * 400;
	enemy.y = -100;
	enemy.lane = lane;
	enemy.speed = 8 * gameSpeed;
	enemyCars.push(enemy);
}
function spawnPowerUp() {
	if (Math.random() < 0.3) {
		// 30% chance
		var lane = Math.floor(Math.random() * 4);
		var powerUp = game.addChild(new PowerUp());
		powerUp.x = 424 + lane * 400;
		powerUp.y = -100;
		powerUp.speed = 8 * gameSpeed;
		powerUps.push(powerUp);
	}
}
game.update = function () {
	// Update distance and speed
	distanceTraveled += gameSpeed;
	gameSpeed = 1 + distanceTraveled / 10000;
	scoreTxt.setText('Distance: ' + Math.floor(distanceTraveled));
	speedTxt.setText('Speed: ' + gameSpeed.toFixed(1) + 'x');
	// Spawn enemies
	spawnTimer++;
	if (spawnTimer >= spawnRate / gameSpeed) {
		spawnEnemyCar();
		spawnTimer = 0;
		spawnRate = Math.max(60, spawnRate - 1); // Increase spawn rate
	}
	// Spawn power-ups
	powerUpSpawnTimer++;
	if (powerUpSpawnTimer >= 300 / gameSpeed) {
		spawnPowerUp();
		powerUpSpawnTimer = 0;
	}
	// Spawn road lines
	lineSpawnTimer++;
	if (lineSpawnTimer >= 25) {
		for (var lane = 0; lane < 4; lane++) {
			var line = game.addChild(new RoadLine());
			line.x = 624 + lane * 400;
			line.y = -100;
			line.speed = 8 * gameSpeed;
			roadLines.push(line);
		}
		lineSpawnTimer = 0;
	}
	// Update and check enemy cars
	for (var i = enemyCars.length - 1; i >= 0; i--) {
		var enemy = enemyCars[i];
		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
		// Remove off-screen enemies
		if (enemy.lastY < 2800 && enemy.y >= 2800) {
			enemy.destroy();
			enemyCars.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (enemy.intersects(playerCar)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
		// Check for near miss (score bonus)
		var distanceFromPlayer = Math.abs(enemy.x - playerCar.x);
		if (enemy.y > playerCar.y - 150 && enemy.y < playerCar.y + 150 && distanceFromPlayer < 200 && distanceFromPlayer > 150) {
			if (!enemy.nearMissScored) {
				LK.setScore(LK.getScore() + 10);
				LK.getSound('dodge').play();
				enemy.nearMissScored = true;
			}
		}
		enemy.lastY = enemy.y;
	}
	// Update and check power-ups
	for (var j = powerUps.length - 1; j >= 0; j--) {
		var powerUp = powerUps[j];
		// Remove off-screen power-ups
		if (powerUp.y > 2800) {
			powerUp.destroy();
			powerUps.splice(j, 1);
			continue;
		}
		// Check collection
		if (powerUp.intersects(playerCar)) {
			LK.setScore(LK.getScore() + 50);
			LK.getSound('collect').play();
			LK.effects.flashObject(powerUp, 0xffffff, 200);
			powerUp.destroy();
			powerUps.splice(j, 1);
		}
	}
	// Update road lines
	for (var k = roadLines.length - 1; k >= 0; k--) {
		var line = roadLines[k];
		// Remove off-screen lines
		if (line.y > 2800) {
			line.destroy();
			roadLines.splice(k, 1);
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -15,8 +15,9 @@
 	});
 	self.speed = 8;
 	self.lane = 0;
 	self.update = function () {
+		self.speed = 8 * gameSpeed;
 		self.y += self.speed;
 	};
 	return self;
 });