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

/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -25;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coinGraphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = gameSpeed;
	self.collected = false;
	self.update = function () {
		self.y += self.speed;
		self.rotation += 0.1;
	};
	return self;
});
var DebrisParticle = Container.expand(function () {
	var self = Container.call(this);
	var debrisGraphics = self.attachAsset('debrisParticle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = (Math.random() - 0.5) * 20; // Random horizontal speed
	self.speedY = -5 - Math.random() * 15; // Upward initial speed
	self.gravity = 0.8; // Gravity acceleration
	self.lifetime = 90 + Math.random() * 60; // 1.5-2.5 seconds
	self.maxLifetime = self.lifetime;
	self.rotationSpeed = (Math.random() - 0.5) * 0.3;
	// Random colors for debris (metal, glass, etc.)
	var debrisColors = [0x666666, 0x888888, 0x444444, 0x999999, 0x333333];
	debrisGraphics.tint = debrisColors[Math.floor(Math.random() * debrisColors.length)];
	self.update = function () {
		// Apply physics
		self.x += self.speedX;
		self.y += self.speedY;
		self.speedY += self.gravity; // Apply gravity
		self.rotation += self.rotationSpeed;
		self.lifetime--;
		// Fade out over time
		var fadeProgress = 1 - self.lifetime / self.maxLifetime;
		self.alpha = Math.max(0, 1 - fadeProgress * 1.5);
	};
	return self;
});
var ExhaustParticle = Container.expand(function () {
	var self = Container.call(this);
	var particleGraphics = self.attachAsset('exhaustParticle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3 + Math.random() * 2;
	self.sideSpeed = (Math.random() - 0.5) * 2;
	self.lifetime = 60 + Math.random() * 30;
	self.maxLifetime = self.lifetime;
	self.update = function () {
		self.y += self.speed;
		self.x += self.sideSpeed;
		self.lifetime--;
		// Fade out and scale up over time
		var fadeProgress = 1 - self.lifetime / self.maxLifetime;
		self.alpha = Math.max(0, 1 - fadeProgress * 1.5);
		self.scaleX = 1 + fadeProgress * 0.8;
		self.scaleY = 1 + fadeProgress * 0.8;
	};
	return self;
});
var Flame = Container.expand(function () {
	var self = Container.call(this);
	var flameGraphics = self.attachAsset('flame', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.speed = -2 - Math.random() * 3;
	self.sideSpeed = (Math.random() - 0.5) * 4;
	self.lifetime = 30 + Math.random() * 20;
	self.maxLifetime = self.lifetime;
	self.flickerTimer = 0;
	self.parentCar = null; // Reference to the police car this flame belongs to
	self.offsetX = 0; // Offset from car position
	self.offsetY = 0; // Offset from car position
	self.update = function () {
		// If attached to a police car, follow its position
		if (self.parentCar && !self.parentCar.isDestroyed) {
			self.x = self.parentCar.x + self.offsetX;
			self.y = self.parentCar.y + self.offsetY;
		}
		self.lifetime--;
		// Flicker effect
		self.flickerTimer++;
		if (self.flickerTimer % 3 === 0) {
			var colors = [0xff4500, 0xff6600, 0xff8800, 0xffaa00];
			flameGraphics.tint = colors[Math.floor(Math.random() * colors.length)];
		}
		// Fade and scale over time
		var fadeProgress = 1 - self.lifetime / self.maxLifetime;
		self.alpha = Math.max(0, 1 - fadeProgress * 1.2);
		self.scaleX = 1.5 + fadeProgress * 1.2; // Increased base size from 0.5 to 1.5
		self.scaleY = 2.0 + fadeProgress * 2.0; // Increased base size from 0.8 to 2.0
	};
	return self;
});
var LaneLine = Container.expand(function () {
	var self = Container.call(this);
	var lineGraphics = self.attachAsset('laneLine', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = gameSpeed;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.speed = gameSpeed;
	// Add police lights to the obstacle (police car)
	var leftLight = self.attachAsset('policeLight', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	leftLight.x = -30;
	leftLight.y = -60;
	var rightLight = self.attachAsset('policeLight', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	rightLight.x = 30;
	rightLight.y = -60;
	rightLight.tint = 0x0000ff; // Make right light blue
	// Add side lights
	var leftSideLight = self.attachAsset('policeLight', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	leftSideLight.x = -45;
	leftSideLight.y = -30;
	var rightSideLight = self.attachAsset('policeLight', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	rightSideLight.x = 45;
	rightSideLight.y = -30;
	rightSideLight.tint = 0x0000ff; // Make right side light blue
	// Add top lights
	var topLeftLight = self.attachAsset('policeLight', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	topLeftLight.x = -15;
	topLeftLight.y = -80;
	var topRightLight = self.attachAsset('policeLight', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	topRightLight.x = 15;
	topRightLight.y = -80;
	topRightLight.tint = 0x0000ff; // Make top right light blue
	self.lightTimer = 0;
	self.isRedActive = true;
	// Lane changing properties
	self.canChangeLanes = false;
	self.laneChangeTimer = 0;
	self.laneChangeDelay = 180 + Math.random() * 240; // 3-7 seconds random delay
	self.targetLaneIndex = Math.floor(Math.random() * 3); // Random target lane
	self.isChangingLanes = false;
	self.originalLaneIndex = 0; // Will be set when spawned
	self.update = function () {
		self.y += self.speed;
		// Handle lane changing behavior - only at night
		if (self.canChangeLanes && !self.isChangingLanes && self.y > 200 && self.y < 2000 && !isDay) {
			self.laneChangeTimer++;
			if (self.laneChangeTimer >= self.laneChangeDelay) {
				// Start lane change
				self.isChangingLanes = true;
				var currentLaneIndex = self.originalLaneIndex;
				// Choose a different lane
				var availableLanes = [];
				for (var i = 0; i < 3; i++) {
					if (i !== currentLaneIndex) {
						availableLanes.push(i);
					}
				}
				if (availableLanes.length > 0) {
					var newLaneIndex = availableLanes[Math.floor(Math.random() * availableLanes.length)];
					var targetX = player.lanes[newLaneIndex];
					// Animate lane change using tween
					tween(self, {
						x: targetX
					}, {
						duration: 1000 + Math.random() * 1000,
						easing: tween.easeInOut,
						onFinish: function onFinish() {
							self.isChangingLanes = false;
							self.originalLaneIndex = newLaneIndex;
							// Set new delay for next potential lane change
							self.laneChangeTimer = 0;
							self.laneChangeDelay = 300 + Math.random() * 600; // 5-15 seconds
						}
					});
				}
			}
		}
		// Police lights visible during day and night, more prominent at night
		var dayAlpha = isDay ? 0.6 : 1.0; // Visible during day, full at night
		var dayAlphaLow = isDay ? 0.3 : 0.5; // Reduced for inactive light but still visible
		// Animate police lights
		self.lightTimer++;
		if (self.lightTimer >= 15) {
			// Change every 15 frames (0.25 seconds at 60fps)
			self.lightTimer = 0;
			self.isRedActive = !self.isRedActive;
			if (self.isRedActive) {
				leftLight.alpha = dayAlpha;
				rightLight.alpha = dayAlphaLow;
				leftSideLight.alpha = dayAlpha;
				rightSideLight.alpha = dayAlphaLow;
				topLeftLight.alpha = dayAlpha;
				topRightLight.alpha = dayAlphaLow;
			} else {
				leftLight.alpha = dayAlphaLow;
				rightLight.alpha = dayAlpha;
				leftSideLight.alpha = dayAlphaLow;
				rightSideLight.alpha = dayAlpha;
				topLeftLight.alpha = dayAlphaLow;
				topRightLight.alpha = dayAlpha;
			}
		}
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	// Add headlights to the player car
	var leftHeadlight = self.attachAsset('headlight', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	leftHeadlight.x = -25;
	leftHeadlight.y = -120;
	leftHeadlight.alpha = 0; // Start invisible
	var rightHeadlight = self.attachAsset('headlight', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	rightHeadlight.x = 25;
	rightHeadlight.y = -120;
	rightHeadlight.alpha = 0; // Start invisible
	// Store headlight references
	self.leftHeadlight = leftHeadlight;
	self.rightHeadlight = rightHeadlight;
	self.groundY = 2300;
	self.lanes = [650, 1024, 1398]; // Three lanes
	self.currentLane = 1; // Middle lane
	self.targetX = self.lanes[self.currentLane];
	self.x = self.targetX;
	self.y = self.groundY;
	self.moveLeft = function () {
		if (self.currentLane > 0) {
			self.currentLane--;
			self.targetX = self.lanes[self.currentLane];
			// Play car movement sound
			try {
				LK.getSound('carMove').play();
			} catch (e) {
				console.log('Car move sound error:', e);
			}
		}
	};
	self.moveRight = function () {
		if (self.currentLane < 2) {
			self.currentLane++;
			self.targetX = self.lanes[self.currentLane];
			// Play car movement sound
			try {
				LK.getSound('carMove').play();
			} catch (e) {
				console.log('Car move sound error:', e);
			}
		}
	};
	self.update = function () {
		// Handle lane switching
		var dx = self.targetX - self.x;
		if (Math.abs(dx) > 2) {
			self.x += dx * 0.15;
		} else {
			self.x = self.targetX;
		}
	};
	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 = gameSpeed;
	self.collected = false;
	self.lifetime = 420; // 7 seconds at 60fps
	self.update = function () {
		self.y += self.speed;
		self.rotation += 0.15;
		// Decrease lifetime
		self.lifetime--;
		// Flash when about to disappear (last 3 seconds)
		if (self.lifetime <= 180 && self.lifetime > 0) {
			self.alpha = (Math.sin(self.lifetime * 0.3) + 1) * 0.5;
		}
	};
	return self;
});
var Smoke = Container.expand(function () {
	var self = Container.call(this);
	var smokeGraphics = self.attachAsset('smoke', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.speed = -1 - Math.random() * 2;
	self.sideSpeed = (Math.random() - 0.5) * 3;
	self.lifetime = 60 + Math.random() * 40;
	self.maxLifetime = self.lifetime;
	self.update = function () {
		self.y += self.speed;
		self.x += self.sideSpeed;
		self.lifetime--;
		// Fade and expand over time
		var fadeProgress = 1 - self.lifetime / self.maxLifetime;
		self.alpha = Math.max(0, 0.8 - fadeProgress * 1.2);
		self.scaleX = 0.3 + fadeProgress * 2;
		self.scaleY = 0.3 + fadeProgress * 2;
	};
	return self;
});
var Tree = Container.expand(function () {
	var self = Container.call(this);
	var treeGraphics = self.attachAsset('tree', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.speed = gameSpeed;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB
});

/**** 
* Game Code
****/ 
var player;
var obstacles = [];
var coins = [];
var powerups = [];
var bullets = [];
var hasWeapon = false;
var weaponTimer = 0;
var weaponDuration = 1200; // 20 seconds at 60fps
var laneLines = [];
var trees = [];
var gameSpeed = 8;
var maxSpeed = 20;
var speedIncrement = 0.005;
var distance = 0;
var obstacleSpawnTimer = 0;
var coinSpawnTimer = 0;
var powerupSpawnTimer = 0;
var laneLineSpawnTimer = 0;
var treeSpawnTimer = 0;
var lastSwipeX = 0;
var lastSwipeY = 0;
var swipeStarted = false;
var policeMusicPlaying = false;
var policeOnScreen = false;
var lives = 3;
var maxLives = 3;
var exhaustParticles = [];
var exhaustSpawnTimer = 0;
var flames = [];
var smokes = [];
var debrisParticles = [];
// Day/night cycle variables
var dayNightTimer = 0;
var dayNightCycleDuration = 3600; // 60 seconds (1 minute) at 60fps
var isDay = true;
var isTransitioning = false;
// Game timer for police lane changing feature
var gameTimer = 0;
var laneChangeStartTime = 7200; // 2 minutes at 60fps (2 * 60 * 60)
// Night speed multiplier
var nightSpeedMultiplier = 1.25; // 25% faster during night
var baseGameSpeed = 8; // Store the base game speed
var dayColors = {
	sky: 0x87CEEB,
	// Light blue sky
	forest: 0x228b22,
	// Forest green
	road: 0xffffff // Normal road color
};
var nightColors = {
	sky: 0x191970,
	// Midnight blue
	forest: 0x0f2f0f,
	// Dark forest green
	road: 0x404040 // Darker road color
};
// Create road background
var roadBackground = game.addChild(LK.getAsset('roadBackground', {
	anchorX: 0.5,
	anchorY: 0.5
}));
roadBackground.x = 1024; // Center of screen
roadBackground.y = 1366;
// Create green forest backgrounds on sides
var leftForest = game.addChild(LK.getAsset('forestBackground', {
	anchorX: 0.5,
	anchorY: 0.5
}));
leftForest.x = 238; // Center of left side area
leftForest.y = 1366;
var rightForest = game.addChild(LK.getAsset('forestBackground', {
	anchorX: 0.5,
	anchorY: 0.5
}));
rightForest.x = 1810; // Center of right side area
rightForest.y = 1366;
// Create road borders
var leftBorder = game.addChild(LK.getAsset('roadBorder', {
	anchorX: 0.5,
	anchorY: 0.5
}));
leftBorder.x = 476; // Left of leftmost lane
leftBorder.y = 1366;
var rightBorder = game.addChild(LK.getAsset('roadBorder', {
	anchorX: 0.5,
	anchorY: 0.5
}));
rightBorder.x = 1572; // Right of rightmost lane
rightBorder.y = 1366;
// Create player
player = game.addChild(new Player());
player.scaleX = 1.3;
player.scaleY = 1.3;
// Create score display
var scoreText = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
// Distance display removed - only counting coins for score
// Create lives display as hearts in top right
var healthBars = [];
for (var h = 0; h < maxLives; h++) {
	var heart = LK.getAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	heart.x = -50 - h * 50;
	heart.y = 80;
	LK.gui.topRight.addChild(heart);
	healthBars.push(heart);
}
// Touch controls
game.down = function (x, y, obj) {
	lastSwipeX = x;
	lastSwipeY = y;
	swipeStarted = true;
};
game.up = function (x, y, obj) {
	if (swipeStarted) {
		var deltaX = x - lastSwipeX;
		var deltaY = y - lastSwipeY;
		var swipeThreshold = 100;
		if (Math.abs(deltaX) > Math.abs(deltaY)) {
			// Horizontal swipe
			if (deltaX > swipeThreshold) {
				player.moveRight();
			} else if (deltaX < -swipeThreshold) {
				player.moveLeft();
			}
		}
	}
	swipeStarted = false;
};
function spawnObstacle() {
	var obstacle = new Obstacle();
	var laneIndex = Math.floor(Math.random() * 3);
	obstacle.x = player.lanes[laneIndex];
	obstacle.y = -100;
	obstacle.speed = gameSpeed;
	obstacle.scaleX = 0.9;
	obstacle.scaleY = 0.9;
	// Set original lane index for lane changing
	obstacle.originalLaneIndex = laneIndex;
	// Enable lane changing after 2 minutes if game has been running long enough
	if (gameTimer >= laneChangeStartTime) {
		obstacle.canChangeLanes = Math.random() < 0.3; // 30% chance to be a lane changer
	}
	tween(obstacle, {
		scaleX: 1.3,
		scaleY: 1.3
	}, {
		duration: 400,
		easing: tween.easeOut
	});
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
function spawnCoin() {
	var coin = new Coin();
	var laneIndex = Math.floor(Math.random() * 3);
	var targetX = player.lanes[laneIndex];
	var canSpawn = true;
	// Check if there's an obstacle in this lane that would conflict
	for (var i = 0; i < obstacles.length; i++) {
		var obstacle = obstacles[i];
		// Check if obstacle is in the same lane and close to spawn area
		if (Math.abs(obstacle.x - targetX) < 50 && obstacle.y >= -300 && obstacle.y <= 200) {
			canSpawn = false;
			break;
		}
	}
	// If we can't spawn in the selected lane, try other lanes
	if (!canSpawn) {
		var availableLanes = [];
		for (var lane = 0; lane < 3; lane++) {
			var laneX = player.lanes[lane];
			var laneAvailable = true;
			for (var j = 0; j < obstacles.length; j++) {
				var obs = obstacles[j];
				if (Math.abs(obs.x - laneX) < 50 && obs.y >= -300 && obs.y <= 200) {
					laneAvailable = false;
					break;
				}
			}
			if (laneAvailable) {
				availableLanes.push(lane);
			}
		}
		// If no lanes are available, don't spawn coin this time
		if (availableLanes.length === 0) {
			return;
		}
		// Pick a random available lane
		laneIndex = availableLanes[Math.floor(Math.random() * availableLanes.length)];
		targetX = player.lanes[laneIndex];
	}
	coin.x = targetX;
	coin.y = -50;
	coin.speed = gameSpeed;
	coin.scaleX = 0.5;
	coin.scaleY = 0.5;
	tween(coin, {
		scaleX: 1,
		scaleY: 1
	}, {
		duration: 500,
		easing: tween.easeOut
	});
	coins.push(coin);
	game.addChild(coin);
}
function spawnPowerUp() {
	var powerup = new PowerUp();
	var laneIndex = Math.floor(Math.random() * 3);
	powerup.x = player.lanes[laneIndex];
	powerup.y = -50;
	powerup.speed = gameSpeed;
	powerup.scaleX = 0.3;
	powerup.scaleY = 0.3;
	tween(powerup, {
		scaleX: 1,
		scaleY: 1
	}, {
		duration: 600,
		easing: tween.easeOut
	});
	powerups.push(powerup);
	game.addChild(powerup);
}
function spawnLaneLine() {
	// Lane dividers between lanes
	var positions = [837, 1211]; // Between lanes 0-1 and 1-2
	for (var i = 0; i < positions.length; i++) {
		var laneLine = new LaneLine();
		laneLine.x = positions[i];
		laneLine.y = -20;
		laneLine.speed = gameSpeed;
		laneLines.push(laneLine);
		game.addChild(laneLine);
	}
}
function spawnExhaustParticle() {
	var particle = new ExhaustParticle();
	particle.x = player.x + (Math.random() - 0.5) * 40;
	particle.y = player.y + 20;
	particle.scaleX = 0.5 + Math.random() * 0.5;
	particle.scaleY = 0.5 + Math.random() * 0.5;
	particle.alpha = 0.6 + Math.random() * 0.4;
	exhaustParticles.push(particle);
	game.addChild(particle);
}
function createFlameEffect(x, y, parentCar) {
	// Create multiple flame particles
	for (var i = 0; i < 12; i++) {
		// Increased from 8 to 12 flames
		var flame = new Flame();
		flame.x = x + (Math.random() - 0.5) * 80; // Increased spread from 60 to 80
		flame.y = y + Math.random() * 40; // Increased spread from 30 to 40
		flame.scaleX = 1.2 + Math.random() * 0.8; // Increased base size from 0.5 to 1.2
		flame.scaleY = 1.2 + Math.random() * 0.8; // Increased base size from 0.5 to 1.2
		// Attach flame to police car if provided
		if (parentCar) {
			flame.parentCar = parentCar;
			flame.offsetX = (Math.random() - 0.5) * 80;
			flame.offsetY = Math.random() * 40 - 60; // Flames above the car
		}
		flames.push(flame);
		game.addChild(flame);
	}
	// Create smoke particles
	for (var j = 0; j < 6; j++) {
		// Increased from 4 to 6 smoke particles
		var smoke = new Smoke();
		smoke.x = x + (Math.random() - 0.5) * 50; // Increased spread from 40 to 50
		smoke.y = y - 10 + Math.random() * 30; // Increased spread from 20 to 30
		smoke.alpha = 0.4 + Math.random() * 0.3;
		smoke.scaleX = 1.5 + Math.random() * 0.5; // Increased smoke size
		smoke.scaleY = 1.5 + Math.random() * 0.5; // Increased smoke size
		smokes.push(smoke);
		game.addChild(smoke);
	}
	// Create debris particles for explosion effect
	for (var k = 0; k < 15; k++) {
		var debris = new DebrisParticle();
		debris.x = x + (Math.random() - 0.5) * 40;
		debris.y = y + (Math.random() - 0.5) * 30;
		debris.scaleX = 0.5 + Math.random() * 1.0;
		debris.scaleY = 0.5 + Math.random() * 1.0;
		debrisParticles.push(debris);
		game.addChild(debris);
	}
}
function spawnTrees() {
	// Spawn trees on left side of road
	var leftPositions = [100, 200, 300, 400];
	for (var i = 0; i < leftPositions.length; i++) {
		if (Math.random() < 0.3) {
			var leftTree = new Tree();
			leftTree.x = leftPositions[i];
			leftTree.y = -80;
			leftTree.speed = gameSpeed;
			// Add some variation in scale
			leftTree.scaleX = 0.8 + Math.random() * 0.4;
			leftTree.scaleY = 0.8 + Math.random() * 0.4;
			// Add slight tint variation for natural look
			var tintVariation = 0.9 + Math.random() * 0.2;
			leftTree.tint = tintVariation * 0x90EE90 | 0;
			// Apply current day/night brightness
			if (!isDay) {
				leftTree.alpha = 0.6;
			}
			trees.push(leftTree);
			game.addChild(leftTree);
		}
	}
	// Spawn trees on right side of road
	var rightPositions = [1648, 1748, 1848, 1948];
	for (var j = 0; j < rightPositions.length; j++) {
		if (Math.random() < 0.3) {
			var rightTree = new Tree();
			rightTree.x = rightPositions[j];
			rightTree.y = -80;
			rightTree.speed = gameSpeed;
			// Add some variation in scale
			rightTree.scaleX = 0.8 + Math.random() * 0.4;
			rightTree.scaleY = 0.8 + Math.random() * 0.4;
			// Add slight tint variation for natural look
			var tintVariation = 0.9 + Math.random() * 0.2;
			rightTree.tint = tintVariation * 0x90EE90 | 0;
			// Apply current day/night brightness
			if (!isDay) {
				rightTree.alpha = 0.6;
			}
			trees.push(rightTree);
			game.addChild(rightTree);
		}
	}
}
// Main game loop
game.update = function () {
	// Update game timer
	gameTimer++;
	// Calculate current base speed with gradual increase
	var currentBaseSpeed = Math.min(maxSpeed, baseGameSpeed + gameTimer * speedIncrement);
	// Apply night speed multiplier
	gameSpeed = isDay ? currentBaseSpeed : currentBaseSpeed * nightSpeedMultiplier;
	// Distance tracking removed - only counting coins for score
	// Spawn obstacles - more frequent during night
	obstacleSpawnTimer++;
	var obstacleSpawnRate = isDay ? 60 + Math.random() * 60 : 30 + Math.random() * 30; // Night: 30-60 frames, Day: 60-120 frames
	if (obstacleSpawnTimer > obstacleSpawnRate) {
		spawnObstacle();
		obstacleSpawnTimer = 0;
	}
	// Spawn coins - dynamically adjust spawn rate based on game speed (increased frequency)
	coinSpawnTimer++;
	var coinSpawnRate = Math.max(20, 80 - (gameSpeed - 8) * 4); // Much faster spawning as speed increases
	if (coinSpawnTimer > coinSpawnRate + Math.random() * 20) {
		spawnCoin();
		coinSpawnTimer = 0;
	}
	// Spawn powerups (rare spawn - every 1 minute)
	powerupSpawnTimer++;
	if (powerupSpawnTimer > 3600) {
		// 1 minute (60 seconds * 60 fps)
		spawnPowerUp();
		powerupSpawnTimer = 0;
	}
	// Spawn lane lines
	laneLineSpawnTimer++;
	if (laneLineSpawnTimer > 30) {
		spawnLaneLine();
		laneLineSpawnTimer = 0;
	}
	// Spawn trees
	treeSpawnTimer++;
	if (treeSpawnTimer > 45) {
		spawnTrees();
		treeSpawnTimer = 0;
	}
	// Update obstacles
	var currentPoliceOnScreen = false;
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		obstacle.speed = gameSpeed;
		// Check if police car is on screen
		if (obstacle.y >= -200 && obstacle.y <= 2900) {
			currentPoliceOnScreen = true;
		}
		// Spawn exhaust particles for police cars
		if (obstacle.y >= -100 && obstacle.y <= 2800 && LK.ticks % 4 === 0) {
			var exhaustParticle = new ExhaustParticle();
			exhaustParticle.x = obstacle.x + (Math.random() - 0.5) * 50;
			exhaustParticle.y = obstacle.y - 120; // Front of the police car
			exhaustParticle.speed = 2 + Math.random() * 2; // Slower than player exhaust
			exhaustParticle.sideSpeed = (Math.random() - 0.5) * 3;
			exhaustParticle.scaleX = 0.7 + Math.random() * 0.4;
			exhaustParticle.scaleY = 0.7 + Math.random() * 0.4;
			exhaustParticle.alpha = 0.5 + Math.random() * 0.3;
			exhaustParticles.push(exhaustParticle);
			game.addChild(exhaustParticle);
		}
		// Remove obstacles that are off screen
		if (obstacle.y > 2800) {
			obstacle.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Check collision with player (skip if obstacle is already hit)
		if (!obstacle.isHit && player.intersects(obstacle)) {
			// Play crash sound
			try {
				LK.getSound('crash').play();
			} catch (e) {
				console.log('Crash sound error:', e);
			}
			// Reduce lives
			lives--;
			// Hide the health bar corresponding to lost life
			if (lives >= 0 && lives < healthBars.length) {
				healthBars[healthBars.length - 1 - lives].visible = false;
			}
			// Flash screen and remove obstacle
			LK.effects.flashScreen(0xff0000, 500);
			obstacle.destroy();
			obstacles.splice(i, 1);
			// Check if game over
			if (lives <= 0) {
				// Add delay to allow crash sound to play before game over
				LK.setTimeout(function () {
					LK.showGameOver();
				}, 800); // Wait 800ms for crash sound to play
				return;
			}
			// Make player temporarily invulnerable
			player.alpha = 0.5;
			LK.setTimeout(function () {
				player.alpha = 1.0;
			}, 1500); // 1.5 seconds of invulnerability
			continue;
		}
	}
	// Handle police music based on police presence
	if (currentPoliceOnScreen && !policeMusicPlaying) {
		// Start police siren as a sound effect that loops instead of music
		// This allows it to play alongside the background music
		try {
			var policeSiren = LK.getSound('policemusic');
			if (policeSiren) {
				policeSiren.loop = true;
				policeSiren.play();
			}
		} catch (e) {
			console.log('Police siren play error:', e);
		}
		policeMusicPlaying = true;
		policeOnScreen = true;
	} else if (!currentPoliceOnScreen && policeMusicPlaying) {
		// Stop police siren sound
		try {
			var policeSiren = LK.getSound('policemusic');
			if (policeSiren) {
				policeSiren.stop();
			}
		} catch (e) {
			console.log('Police siren stop error:', e);
		}
		policeMusicPlaying = false;
		policeOnScreen = false;
	} else if (currentPoliceOnScreen && policeMusicPlaying) {
		// Ensure police siren continues playing if it stopped
		try {
			var policeSiren = LK.getSound('policemusic');
			if (policeSiren && !policeSiren.playing) {
				policeSiren.loop = true;
				policeSiren.play();
			}
		} catch (e) {
			console.log('Police siren restart error:', e);
		}
	}
	// Update coins
	for (var j = coins.length - 1; j >= 0; j--) {
		var coin = coins[j];
		coin.speed = gameSpeed;
		// Remove coins that are off screen
		if (coin.y > 2800) {
			coin.destroy();
			coins.splice(j, 1);
			continue;
		}
		// Check collection
		if (!coin.collected && player.intersects(coin)) {
			coin.collected = true;
			LK.setScore(LK.getScore() + 1); // Each coin is worth exactly 1 point
			scoreText.setText('Score: ' + LK.getScore());
			LK.getSound('collect').play();
			// Enhanced visual effect with faster animation for higher speeds
			var animationDuration = Math.max(200, 400 - (gameSpeed - 8) * 10);
			tween(coin, {
				alpha: 0,
				scaleX: 2.5,
				scaleY: 2.5,
				y: coin.y - 50
			}, {
				duration: animationDuration,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					coin.destroy();
				}
			});
			coins.splice(j, 1);
		}
	}
	// Update powerups
	for (var p = powerups.length - 1; p >= 0; p--) {
		var powerup = powerups[p];
		powerup.speed = gameSpeed;
		// Remove powerups that are off screen or expired
		if (powerup.y > 2800 || powerup.lifetime <= 0) {
			powerup.destroy();
			powerups.splice(p, 1);
			continue;
		}
		// Check collection
		if (!powerup.collected && player.intersects(powerup)) {
			powerup.collected = true;
			hasWeapon = true;
			weaponTimer = weaponDuration; // 20 seconds
			LK.getSound('collect').play();
			// Visual effect
			tween(powerup, {
				alpha: 0,
				scaleX: 3,
				scaleY: 3
			}, {
				duration: 400,
				onFinish: function onFinish() {
					powerup.destroy();
				}
			});
			powerups.splice(p, 1);
		}
	}
	// Update lane lines
	for (var k = laneLines.length - 1; k >= 0; k--) {
		var laneLine = laneLines[k];
		laneLine.speed = gameSpeed;
		// Remove lane lines that are off screen
		if (laneLine.y > 2800) {
			laneLine.destroy();
			laneLines.splice(k, 1);
		}
	}
	// Update trees
	for (var t = trees.length - 1; t >= 0; t--) {
		var tree = trees[t];
		tree.speed = gameSpeed;
		// Remove trees that are off screen
		if (tree.y > 2800) {
			tree.destroy();
			trees.splice(t, 1);
		}
	}
	// Spawn exhaust particles
	exhaustSpawnTimer++;
	if (exhaustSpawnTimer >= 3) {
		spawnExhaustParticle();
		exhaustSpawnTimer = 0;
	}
	// Update exhaust particles
	for (var e = exhaustParticles.length - 1; e >= 0; e--) {
		var particle = exhaustParticles[e];
		// Remove particles that are expired or off screen
		if (particle.lifetime <= 0 || particle.y < -50) {
			particle.destroy();
			exhaustParticles.splice(e, 1);
		}
	}
	// Update flame particles
	for (var f = flames.length - 1; f >= 0; f--) {
		var flame = flames[f];
		// Remove flames that are expired or off screen
		if (flame.lifetime <= 0 || flame.y < -50) {
			flame.destroy();
			flames.splice(f, 1);
		}
	}
	// Update smoke particles
	for (var s = smokes.length - 1; s >= 0; s--) {
		var smoke = smokes[s];
		// Remove smoke that is expired or off screen
		if (smoke.lifetime <= 0 || smoke.y < -50) {
			smoke.destroy();
			smokes.splice(s, 1);
		}
	}
	// Update debris particles
	for (var d = debrisParticles.length - 1; d >= 0; d--) {
		var debris = debrisParticles[d];
		// Remove debris that is expired or off screen
		if (debris.lifetime <= 0 || debris.y > 2800) {
			debris.destroy();
			debrisParticles.splice(d, 1);
		}
	}
	// Handle weapon system
	if (hasWeapon) {
		weaponTimer--;
		if (weaponTimer <= 0) {
			hasWeapon = false;
		}
		// Shoot bullets every 40 frames (1.5 times per second)
		if (LK.ticks % 40 === 0) {
			var bullet = new Bullet();
			bullet.x = player.x;
			bullet.y = player.y - 100;
			bullets.push(bullet);
			game.addChild(bullet);
			// Play gun sound
			LK.getSound('gunshot').play();
		}
	}
	// Update bullets
	for (var b = bullets.length - 1; b >= 0; b--) {
		var bullet = bullets[b];
		// Remove bullets that are off screen
		if (bullet.y < -50) {
			bullet.destroy();
			bullets.splice(b, 1);
			continue;
		}
		// Check bullet collision with obstacles
		for (var o = obstacles.length - 1; o >= 0; o--) {
			var obstacle = obstacles[o];
			if (!obstacle.isHit && bullet.intersects(obstacle)) {
				// Play police hit sound
				try {
					LK.getSound('policeHit').play();
				} catch (e) {
					console.log('Police hit sound error:', e);
				}
				// Destroy bullet immediately
				bullet.destroy();
				bullets.splice(b, 1);
				// Mark obstacle as hit to prevent further collisions
				obstacle.isHit = true;
				// Create flame effect at police car position with car reference
				createFlameEffect(obstacle.x, obstacle.y - 50, obstacle);
				// Create burning effect with flames
				tween(obstacle, {
					tint: 0x000000,
					alpha: 0
				}, {
					duration: 800,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						obstacle.isDestroyed = true; // Mark as destroyed for flame cleanup
						obstacle.destroy();
						// Remove from obstacles array after animation completes
						var index = obstacles.indexOf(obstacle);
						if (index > -1) {
							obstacles.splice(index, 1);
						}
					}
				});
				break;
			}
		}
	}
	// Update day/night cycle
	dayNightTimer++;
	if (dayNightTimer >= dayNightCycleDuration) {
		transitionDayNight();
		dayNightTimer = 0;
	}
	// Move all police exhaust particles to the very front at the end of update cycle
	for (var ex = 0; ex < exhaustParticles.length; ex++) {
		var exhaustParticle = exhaustParticles[ex];
		// Only move police exhaust particles (those with speed <= 4) to front
		if (exhaustParticle.speed <= 4) {
			game.setChildIndex(exhaustParticle, game.children.length - 1);
		}
	}
	// Road color no longer changes automatically
};
// Road color change function (kept for potential future use)
function changeRoadColor(newColor) {
	roadBackground.tint = newColor;
}
// Day/night cycle transition function
function transitionDayNight() {
	if (isTransitioning) return;
	isTransitioning = true;
	isDay = !isDay;
	var targetColors = isDay ? dayColors : nightColors;
	var transitionDuration = 2000; // 2 seconds transition
	// Immediately update game speed for the new cycle
	var currentBaseSpeed = Math.min(maxSpeed, baseGameSpeed + gameTimer * speedIncrement);
	gameSpeed = isDay ? currentBaseSpeed : currentBaseSpeed * nightSpeedMultiplier;
	// Transition background color
	tween(game, {
		backgroundColor: targetColors.sky
	}, {
		duration: transitionDuration,
		easing: tween.easeInOut
	});
	// Transition forest backgrounds
	tween(leftForest, {
		tint: targetColors.forest
	}, {
		duration: transitionDuration,
		easing: tween.easeInOut
	});
	tween(rightForest, {
		tint: targetColors.forest
	}, {
		duration: transitionDuration,
		easing: tween.easeInOut
	});
	// Transition road background
	tween(roadBackground, {
		tint: targetColors.road
	}, {
		duration: transitionDuration,
		easing: tween.easeInOut,
		onFinish: function onFinish() {
			isTransitioning = false;
		}
	});
	// Adjust trees brightness for night/day
	var treeBrightness = isDay ? 1.0 : 0.6;
	for (var i = 0; i < trees.length; i++) {
		var tree = trees[i];
		tween(tree, {
			alpha: treeBrightness
		}, {
			duration: transitionDuration,
			easing: tween.easeInOut
		});
	}
	// Control player headlights based on day/night
	var headlightAlpha = isDay ? 0 : 0.8;
	tween(player.leftHeadlight, {
		alpha: headlightAlpha
	}, {
		duration: transitionDuration,
		easing: tween.easeInOut
	});
	tween(player.rightHeadlight, {
		alpha: headlightAlpha
	}, {
		duration: transitionDuration,
		easing: tween.easeInOut
	});
}
// Spawn initial powerup at game start
spawnPowerUp();
// Start background music - this will be the base music layer
LK.playMusic('bgmusic', {
	fade: {
		start: 0,
		end: 1,
		duration: 1000
	}
});
;

===================================================================
--- original.js
+++ change.js
@@ -783,12 +783,9 @@
 			exhaustParticle.scaleX = 0.7 + Math.random() * 0.4;
 			exhaustParticle.scaleY = 0.7 + Math.random() * 0.4;
 			exhaustParticle.alpha = 0.5 + Math.random() * 0.3;
 			exhaustParticles.push(exhaustParticle);
-			// Add to the very front by adding after all other elements
 			game.addChild(exhaustParticle);
-			// Move to front layer by setting as last child
-			game.setChildIndex(exhaustParticle, game.children.length - 1);
 		}
 		// Remove obstacles that are off screen
 		if (obstacle.y > 2800) {
 			obstacle.destroy();
@@ -1062,8 +1059,16 @@
 	if (dayNightTimer >= dayNightCycleDuration) {
 		transitionDayNight();
 		dayNightTimer = 0;
 	}
+	// Move all police exhaust particles to the very front at the end of update cycle
+	for (var ex = 0; ex < exhaustParticles.length; ex++) {
+		var exhaustParticle = exhaustParticles[ex];
+		// Only move police exhaust particles (those with speed <= 4) to front
+		if (exhaustParticle.speed <= 4) {
+			game.setChildIndex(exhaustParticle, game.children.length - 1);
+		}
+	}
 	// Road color no longer changes automatically
 };
 // Road color change function (kept for potential future use)
 function changeRoadColor(newColor) {