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

/**** 
* Classes
****/ 
var Car = Container.expand(function () {
	var self = Container.call(this);
	var carGraphics = self.attachAsset('car', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.currentLane = 1; // Start in second lane (0-3)
	self.isMoving = false;
	self.switchLane = function (direction) {
		if (self.isMoving) return;
		var newLane = self.currentLane + direction;
		if (newLane < 0 || newLane > 3) return;
		self.isMoving = true;
		self.currentLane = newLane;
		var targetX = lanePositions[self.currentLane];
		tween(self, {
			x: targetX
		}, {
			duration: 150,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				self.isMoving = false;
			}
		});
	};
	return self;
});
var LaneDivider = Container.expand(function () {
	var self = Container.call(this);
	var dividerGraphics = self.attachAsset('laneDivider', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = baseSpeed;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732 + 50) {
			self.y = -50;
		}
	};
	return self;
});
var Obstacle = Container.expand(function (carRef) {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = baseSpeed;
	self.transformed = false;
	self.carRef = carRef;
	self.lane = -1; // Initialize lane property
	self.update = function () {
		self.y += self.speed;
		// Track if we're close to the car
		if (self.carRef && !self.transformed) {
			var distance = Math.abs(self.y - self.carRef.y);
			// Check if close AND in the same lane
			if (distance < 450 && self.lane === self.carRef.currentLane) {
				// When really close and in same lane
				self.transformed = true;
				// Transform into green circle
				self.removeChildren();
				var greenCircle = self.attachAsset('greenCircle', {
					anchorX: 0.5,
					anchorY: 0.5
				});
			}
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Game constants
var laneWidth = 512; // Width of each lane (2048 / 4)
var lanePositions = [256, 768, 1280, 1792]; // Center of each lane
var baseSpeed = 8;
var currentSpeed = baseSpeed;
var speedIncreaseRate = 0.0002;
var obstacleSpawnDelay = 90; // Ticks between obstacle spawns
var lastObstacleSpawn = 0;
// Game variables
var car;
var obstacles = [];
var laneDividers = [];
var distance = 0;
var scoreText;
// Create road background
var road = game.addChild(LK.getAsset('road', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1366
}));
// Create lane dividers
for (var lane = 0; lane < 3; lane++) {
	for (var i = 0; i < 30; i++) {
		var divider = new LaneDivider();
		divider.x = (lane + 1) * laneWidth; // Place dividers at lane boundaries
		divider.y = i * 120;
		laneDividers.push(divider);
		game.addChild(divider);
	}
}
// Create car
car = new Car();
car.x = lanePositions[1]; // Start in second lane
car.y = 2200;
game.addChild(car);
// Create score display
scoreText = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
// Input handling
game.down = function (x, y, obj) {
	if (x < 1024) {
		// Left side - move left
		car.switchLane(-1);
	} else {
		// Right side - move right
		car.switchLane(1);
	}
};
// Keyboard input handling
LK.on('keydown', function (event) {
	if (event.key === 'ArrowLeft') {
		car.switchLane(-1);
	} else if (event.key === 'ArrowRight') {
		car.switchLane(1);
	}
});
// Main game loop
game.update = function () {
	// Update speed
	currentSpeed = baseSpeed + LK.ticks * speedIncreaseRate;
	// Update distance and score
	distance += currentSpeed;
	LK.setScore(Math.floor(distance / 10));
	scoreText.setText(LK.getScore());
	// Spawn obstacles
	if (LK.ticks - lastObstacleSpawn > obstacleSpawnDelay) {
		lastObstacleSpawn = LK.ticks;
		// Random lane for obstacle
		var lane = Math.floor(Math.random() * 4);
		var obstacle = new Obstacle(car);
		obstacle.x = lanePositions[lane];
		obstacle.y = -100;
		obstacle.speed = currentSpeed;
		obstacle.lane = lane; // Set the lane for this obstacle
		obstacles.push(obstacle);
		game.addChild(obstacle);
		// Decrease spawn delay as game progresses
		obstacleSpawnDelay = Math.max(30, 90 - Math.floor(distance / 5000));
	}
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		obstacle.speed = currentSpeed;
		// Check if obstacle is off screen
		if (obstacle.y > 2732 + 100) {
			obstacle.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Check collision with car
		if (obstacle.intersects(car)) {
			LK.showGameOver();
		}
	}
	// Update lane dividers speed
	for (var j = 0; j < laneDividers.length; j++) {
		laneDividers[j].speed = currentSpeed;
	}
};

===================================================================
--- original.js
+++ change.js
@@ -141,8 +141,16 @@
 		// Right side - move right
 		car.switchLane(1);
 	}
 };
+// Keyboard input handling
+LK.on('keydown', function (event) {
+	if (event.key === 'ArrowLeft') {
+		car.switchLane(-1);
+	} else if (event.key === 'ArrowRight') {
+		car.switchLane(1);
+	}
+});
 // Main game loop
 game.update = function () {
 	// Update speed
 	currentSpeed = baseSpeed + LK.ticks * speedIncreaseRate;