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

/**** 
* Classes
****/ 
var Animal = Container.expand(function () {
	var self = Container.call(this);
	var animalGraphics = self.attachAsset('animal', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = (Math.random() - 0.5) * 4;
	self.speedY = (Math.random() - 0.5) * 4;
	self.lifeTime = 300; // 5 seconds at 60fps
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
		self.lifeTime--;
		if (self.lifeTime <= 0) {
			self.destroy();
		}
	};
	return self;
});
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = (Math.random() - 0.5) * 5;
	self.speedY = (Math.random() - 0.5) * 5;
	self.lifeTime = 350;
	self.flapTimer = 0;
	self.baseY = 0;
	self.animOffset = Math.random() * Math.PI * 2;
	self.update = function () {
		// Flying movement with up/down oscillation
		if (self.baseY === 0) {
			self.baseY = self.y;
		}
		self.x += self.speedX;
		self.y = self.baseY + Math.sin(LK.ticks * 0.1 + self.animOffset) * 15;
		// Wing flapping animation
		self.flapTimer++;
		if (self.flapTimer >= 5) {
			self.flapTimer = 0;
			var flapScale = 0.8 + Math.sin(LK.ticks * 0.3 + self.animOffset) * 0.2;
			birdGraphics.scaleX = flapScale;
		}
		self.lifeTime--;
		if (self.lifeTime <= 0) {
			self.destroy();
		}
	};
	return self;
});
var Deer = Container.expand(function () {
	var self = Container.call(this);
	var deerGraphics = self.attachAsset('deer', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = (Math.random() - 0.5) * 2; // Slower movement
	self.speedY = (Math.random() - 0.5) * 2;
	self.lifeTime = 500; // Lives longest
	self.panicTimer = 0;
	self.isPanicking = false;
	self.update = function () {
		// Deer occasionally panic and run faster
		if (!self.isPanicking && Math.random() < 0.005) {
			self.isPanicking = true;
			self.panicTimer = 60; // Panic for 1 second
			self.speedX *= 3;
			self.speedY *= 3;
			// Flash effect when panicking
			tween(deerGraphics, {
				tint: 0xFFAAAA
			}, {
				duration: 200,
				easing: tween.easeInOut,
				onFinish: function onFinish() {
					tween(deerGraphics, {
						tint: 0xFFFFFF
					}, {
						duration: 200,
						easing: tween.easeInOut
					});
				}
			});
		}
		if (self.isPanicking) {
			self.panicTimer--;
			if (self.panicTimer <= 0) {
				self.isPanicking = false;
				self.speedX /= 3;
				self.speedY /= 3;
			}
		}
		self.x += self.speedX;
		self.y += self.speedY;
		self.lifeTime--;
		if (self.lifeTime <= 0) {
			self.destroy();
		}
	};
	return self;
});
var Fire = Container.expand(function (size) {
	var self = Container.call(this);
	self.size = size || 1;
	self.maxSize = 10; // Maximum fire size
	self.waterNeeded = self.size;
	self.growthTimer = 0;
	// Fire grows every 20 seconds (1200 ticks at 60fps)
	self.growthInterval = 1200; // 20 seconds fixed interval
	var fireGraphics = self.attachAsset(self.size === 1 ? 'smallFire' : 'largeFire', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set initial scale based on fire size
	var initialScale = 0.5 + (self.size - 1) * 0.2; // Start smaller, scale up with size
	fireGraphics.scaleX = initialScale;
	fireGraphics.scaleY = initialScale;
	// Add flickering animation
	self.animOffset = Math.random() * Math.PI * 2;
	self.update = function () {
		// Growth logic - fire grows every 7 seconds
		self.growthTimer++;
		if (self.growthTimer >= self.growthInterval && self.size < self.maxSize) {
			self.size++;
			self.waterNeeded = self.size;
			self.growthTimer = 0;
			// Update size text
			if (self.sizeText) {
				self.sizeText.setText(self.size.toString());
			}
			// Update visual scale based on size - smaller start, bigger growth
			var scale = 0.5 + (self.size - 1) * 0.25; // Start at 0.5, increase by 25% per size level
			tween(fireGraphics, {
				scaleX: scale,
				scaleY: scale
			}, {
				duration: 500,
				easing: tween.easeOut
			});
			// Change color intensity based on size
			var intensity = Math.min(1, 0.5 + (self.size - 1) * 0.1);
			var redComponent = 0xFF;
			var greenBlueComponent = Math.floor((1 - intensity) * 0x44);
			var redTint = redComponent << 16 | greenBlueComponent << 8 | greenBlueComponent;
			tween(fireGraphics, {
				tint: redTint
			}, {
				duration: 500,
				easing: tween.easeOut
			});
		}
		// Flickering animation
		var flicker = 0.8 + Math.sin(LK.ticks * 0.1 + self.animOffset) * 0.2;
		fireGraphics.alpha = flicker;
		var baseScaleX = fireGraphics.scaleX || 1;
		var baseScaleY = fireGraphics.scaleY || 1;
		fireGraphics.scaleX = baseScaleX + Math.sin(LK.ticks * 0.08 + self.animOffset) * 0.1;
		fireGraphics.scaleY = baseScaleY + Math.sin(LK.ticks * 0.08 + self.animOffset) * 0.1;
	};
	return self;
});
var HeartPowerUp = Container.expand(function () {
	var self = Container.call(this);
	var heartGraphics = self.attachAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5
	});
	self.lifeTime = 600; // 10 seconds at 60fps
	self.animOffset = Math.random() * Math.PI * 2;
	self.update = function () {
		// Floating animation
		heartGraphics.y = Math.sin(LK.ticks * 0.1 + self.animOffset) * 10;
		// Pulsing animation
		var pulse = 1.0 + Math.sin(LK.ticks * 0.15 + self.animOffset) * 0.3;
		heartGraphics.scaleX = 1.5 * pulse;
		heartGraphics.scaleY = 1.5 * pulse;
		// Fade out in last 2 seconds
		if (self.lifeTime <= 120) {
			heartGraphics.alpha = self.lifeTime / 120;
		}
		self.lifeTime--;
		if (self.lifeTime <= 0) {
			self.destroy();
		}
	};
	return self;
});
var Rabbit = Container.expand(function () {
	var self = Container.call(this);
	var rabbitGraphics = self.attachAsset('rabbit', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = (Math.random() - 0.5) * 6; // Faster than regular animals
	self.speedY = (Math.random() - 0.5) * 6;
	self.lifeTime = 400; // Lives longer
	self.hopTimer = 0;
	self.hopInterval = 20; // Hop every 20 ticks
	self.update = function () {
		self.hopTimer++;
		// Hopping movement - move in bursts
		if (self.hopTimer >= self.hopInterval) {
			self.x += self.speedX * 2; // Burst movement
			self.y += self.speedY * 2;
			self.hopTimer = 0;
			// Add hop animation
			tween(rabbitGraphics, {
				scaleY: 1.3
			}, {
				duration: 100,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					tween(rabbitGraphics, {
						scaleY: 1.0
					}, {
						duration: 100,
						easing: tween.easeIn
					});
				}
			});
		}
		self.lifeTime--;
		if (self.lifeTime <= 0) {
			self.destroy();
		}
	};
	return self;
});
var Rock = Container.expand(function () {
	var self = Container.call(this);
	var rockGraphics = self.attachAsset('rock', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add some visual variation to rocks
	self.animOffset = Math.random() * Math.PI * 2;
	self.update = function () {
		// Subtle rotation animation
		rockGraphics.rotation = Math.sin(LK.ticks * 0.01 + self.animOffset) * 0.1;
	};
	return self;
});
var SnakeSegment = Container.expand(function (isHead, isTail) {
	var self = Container.call(this);
	var assetType = isHead ? 'snakeHead' : isTail ? 'snakeTail' : 'snakeBody';
	var segmentGraphics = self.attachAsset(assetType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});
var WaterDroplet = Container.expand(function () {
	var self = Container.call(this);
	var waterGraphics = self.attachAsset('water', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add floating animation
	self.animOffset = Math.random() * Math.PI * 2;
	self.update = function () {
		waterGraphics.y = Math.sin(LK.ticks * 0.05 + self.animOffset) * 5;
	};
	return self;
});
var WaterSpray = Container.expand(function (startX, startY, targetX, targetY) {
	var self = Container.call(this);
	// Create multiple water droplets for spray effect
	self.droplets = [];
	for (var i = 0; i < 8; i++) {
		var droplet = self.attachAsset('water', {
			anchorX: 0.5,
			anchorY: 0.5,
			scaleX: 0.3,
			scaleY: 0.3
		});
		// Position droplet at start position
		droplet.x = 0;
		droplet.y = 0;
		// Calculate spray direction with some randomness
		var angle = Math.atan2(targetY - startY, targetX - startX);
		var spreadAngle = (Math.random() - 0.5) * 0.8; // Random spread
		var finalAngle = angle + spreadAngle;
		// Set movement properties
		droplet.velocityX = Math.cos(finalAngle) * (3 + Math.random() * 2);
		droplet.velocityY = Math.sin(finalAngle) * (3 + Math.random() * 2);
		droplet.life = 30 + Math.random() * 20; // Random lifetime
		droplet.maxLife = droplet.life;
		self.droplets.push(droplet);
	}
	self.x = startX;
	self.y = startY;
	self.totalLife = 60;
	self.update = function () {
		self.totalLife--;
		// Update each droplet
		for (var i = self.droplets.length - 1; i >= 0; i--) {
			var droplet = self.droplets[i];
			// Move droplet
			droplet.x += droplet.velocityX;
			droplet.y += droplet.velocityY;
			// Fade out droplet
			droplet.life--;
			droplet.alpha = droplet.life / droplet.maxLife;
			// Remove dead droplets
			if (droplet.life <= 0) {
				self.removeChild(droplet);
				self.droplets.splice(i, 1);
			}
		}
		// Remove spray when all droplets are gone or time is up
		if (self.droplets.length === 0 || self.totalLife <= 0) {
			self.destroy();
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2F4F2F
});

/**** 
* Game Code
****/ 
// Add forest background
var forestBackground = game.attachAsset('forest', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
// Background tracking variables
var currentBackgroundLevel = 0;
var backgrounds = ['forest', 'desert', 'snow', 'jungle', 'volcano'];
var backgroundAssets = [forestBackground];
// Game variables
var snake = [];
var snakeDirection = {
	x: 1,
	y: 0
};
var nextDirection = {
	x: 1,
	y: 0
};
var gridSize = 60;
var gameWidth = 2048;
var gameHeight = 2732;
var cols = Math.floor(gameWidth / gridSize);
var rows = Math.floor(gameHeight / gridSize);
var waterDroplets = [];
var fires = [];
var waterCollected = 0;
var moveTimer = 0;
var moveInterval = 15; // Snake moves every 15 ticks
var gameRunning = true;
var animals = [];
var rocks = [];
var heartPowerUps = [];
var maxFires = 1; // Start with 1 fire, increase with level
var lives = 3; // Player starts with 3 lives
var heartIcons = [];
// UI Elements
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var waterTxt = new Text2('Water: 0', {
	size: 70,
	fill: 0x1E90FF
});
waterTxt.anchor.set(1, 0);
waterTxt.x = -20;
waterTxt.y = 80;
LK.gui.topRight.addChild(waterTxt);
// Create UI bar container positioned at the top
var uiBar = new Container();
uiBar.y = 20;
uiBar.x = 150;
LK.gui.topLeft.addChild(uiBar);
// Create heart icons for lives
for (var i = 0; i < 3; i++) {
	var heart = LK.getAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2.4,
		scaleY: 2.4
	});
	heart.x = i * 50;
	heart.y = 0;
	heartIcons.push(heart);
	uiBar.addChild(heart);
}
// Sound control button
var isMuted = false;
var soundBtn = LK.getAsset('soundOn', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 2.4,
	scaleY: 2.4
});
soundBtn.x = 200;
soundBtn.y = 0;
uiBar.addChild(soundBtn);
// Sound button click handler
soundBtn.down = function (x, y, obj) {
	isMuted = !isMuted;
	if (isMuted) {
		LK.stopMusic();
		soundBtn.removeChild(soundBtn.children[0]);
		soundBtn.attachAsset('soundOff', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else {
		LK.playMusic('bgmusic');
		soundBtn.removeChild(soundBtn.children[0]);
		soundBtn.attachAsset('soundOn', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	}
};
// Initialize snake
function initSnake() {
	// Create initial snake with 3 segments
	for (var i = 0; i < 3; i++) {
		var isHead = i === 0;
		var isTail = i === 2; // Last segment is tail
		var segment = new SnakeSegment(isHead, isTail);
		segment.x = (5 - i) * gridSize + gridSize / 2;
		segment.y = 5 * gridSize + gridSize / 2;
		snake.push(segment);
		game.addChild(segment);
	}
}
// Convert grid coordinates to world coordinates
function gridToWorld(gridX, gridY) {
	return {
		x: gridX * gridSize + gridSize / 2,
		y: gridY * gridSize + gridSize / 2
	};
}
// Convert world coordinates to grid coordinates
function worldToGrid(worldX, worldY) {
	return {
		x: Math.floor(worldX / gridSize),
		y: Math.floor(worldY / gridSize)
	};
}
// Get random empty grid position
function getRandomEmptyPosition() {
	var attempts = 0;
	while (attempts < 100) {
		var gridX = Math.floor(Math.random() * cols);
		var gridY = Math.floor(Math.random() * rows);
		var worldPos = gridToWorld(gridX, gridY);
		var occupied = false;
		// Check if position is occupied by snake
		for (var i = 0; i < snake.length; i++) {
			var snakeGrid = worldToGrid(snake[i].x, snake[i].y);
			if (snakeGrid.x === gridX && snakeGrid.y === gridY) {
				occupied = true;
				break;
			}
		}
		// Check if position is occupied by water
		if (!occupied) {
			for (var i = 0; i < waterDroplets.length; i++) {
				var waterGrid = worldToGrid(waterDroplets[i].x, waterDroplets[i].y);
				if (waterGrid.x === gridX && waterGrid.y === gridY) {
					occupied = true;
					break;
				}
			}
		}
		// Check if position is occupied by fire
		if (!occupied) {
			for (var i = 0; i < fires.length; i++) {
				var fireGrid = worldToGrid(fires[i].x, fires[i].y);
				if (fireGrid.x === gridX && fireGrid.y === gridY) {
					occupied = true;
					break;
				}
			}
		}
		// Check if position is occupied by rock
		if (!occupied) {
			for (var i = 0; i < rocks.length; i++) {
				var rockGrid = worldToGrid(rocks[i].x, rocks[i].y);
				if (rockGrid.x === gridX && rockGrid.y === gridY) {
					occupied = true;
					break;
				}
			}
		}
		if (!occupied) {
			return worldPos;
		}
		attempts++;
	}
	// Fallback to center if no empty position found
	return gridToWorld(Math.floor(cols / 2), Math.floor(rows / 2));
}
// Spawn water droplet
function spawnWater() {
	var pos = getRandomEmptyPosition();
	var water = new WaterDroplet();
	water.x = pos.x;
	water.y = pos.y;
	waterDroplets.push(water);
	game.addChild(water);
}
// Spawn fire
function spawnFire() {
	var pos = getRandomEmptyPosition();
	var fireSize = Math.random() < 0.7 ? 1 : 2; // 70% chance for small fire
	var fire = new Fire(fireSize);
	fire.x = pos.x;
	fire.y = pos.y;
	// Add size display text
	fire.sizeText = new Text2(fire.size.toString(), {
		size: 50,
		fill: 0xFFFFFF
	});
	fire.sizeText.anchor.set(0.5, 0.5);
	fire.sizeText.x = 0;
	fire.sizeText.y = -50;
	fire.addChild(fire.sizeText);
	fires.push(fire);
	game.addChild(fire);
	// Spawn multiple escaping animals near fire
	var animalCount = Math.floor(Math.random() * 3) + 2; // 2-4 animals
	for (var j = 0; j < animalCount; j++) {
		var animal;
		var animalType = Math.random();
		if (animalType < 0.4) {
			// 40% chance for rabbit
			animal = new Rabbit();
		} else if (animalType < 0.7) {
			// 30% chance for deer
			animal = new Deer();
		} else if (animalType < 0.9) {
			// 20% chance for bird
			animal = new Bird();
		} else {
			// 10% chance for regular animal
			animal = new Animal();
		}
		animal.x = pos.x + (Math.random() - 0.5) * 120;
		animal.y = pos.y + (Math.random() - 0.5) * 120;
		animals.push(animal);
		game.addChild(animal);
	}
}
// Spawn rock obstacle
function spawnRock() {
	var pos = getRandomEmptyPosition();
	var rock = new Rock();
	rock.x = pos.x;
	rock.y = pos.y;
	// Scale rock based on score - start at 2x, increase with score
	var baseScale = 2.0; // Start at 2x size
	var scoreMultiplier = Math.floor(LK.getScore() / 1000) * 0.5; // +0.5x every 1000 points
	var finalScale = baseScale + scoreMultiplier;
	rock.children[0].scaleX = finalScale;
	rock.children[0].scaleY = finalScale;
	rocks.push(rock);
	game.addChild(rock);
}
// Spawn heart power-up
function spawnHeartPowerUp() {
	var pos = getRandomEmptyPosition();
	var heartPowerUp = new HeartPowerUp();
	heartPowerUp.x = pos.x;
	heartPowerUp.y = pos.y;
	heartPowerUps.push(heartPowerUp);
	game.addChild(heartPowerUp);
	// Auto-remove after 10 seconds using tween
	tween(heartPowerUp, {}, {
		duration: 10000,
		onFinish: function onFinish() {
			for (var i = heartPowerUps.length - 1; i >= 0; i--) {
				if (heartPowerUps[i] === heartPowerUp) {
					heartPowerUp.destroy();
					heartPowerUps.splice(i, 1);
					break;
				}
			}
		}
	});
}
// Move snake
function moveSnake() {
	if (!gameRunning) {
		return;
	}
	// Update direction
	snakeDirection.x = nextDirection.x;
	snakeDirection.y = nextDirection.y;
	// Calculate new head position
	var head = snake[0];
	var headGrid = worldToGrid(head.x, head.y);
	var newHeadGrid = {
		x: headGrid.x + snakeDirection.x,
		y: headGrid.y + snakeDirection.y
	};
	// Check boundaries
	if (newHeadGrid.x < 0 || newHeadGrid.x >= cols || newHeadGrid.y < 0 || newHeadGrid.y >= rows) {
		gameOver();
		return;
	}
	// Check self collision
	for (var i = 0; i < snake.length; i++) {
		var segmentGrid = worldToGrid(snake[i].x, snake[i].y);
		if (segmentGrid.x === newHeadGrid.x && segmentGrid.y === newHeadGrid.y) {
			gameOver();
			return;
		}
	}
	// Check rock collision
	for (var i = 0; i < rocks.length; i++) {
		var rock = rocks[i];
		var rockGrid = worldToGrid(rock.x, rock.y);
		if (rockGrid.x === newHeadGrid.x && rockGrid.y === newHeadGrid.y) {
			gameOver();
			return;
		}
	}
	// Move snake body and rotate segments
	for (var i = snake.length - 1; i > 0; i--) {
		// Store previous position for rotation calculation
		var prevX = snake[i].x;
		var prevY = snake[i].y;
		// Move to new position
		snake[i].x = snake[i - 1].x;
		snake[i].y = snake[i - 1].y;
		// Calculate direction for body segment rotation
		var dirX = snake[i].x - prevX;
		var dirY = snake[i].y - prevY;
		// Rotate body segment based on movement direction
		if (dirX > 0 && dirY === 0) {
			// Moving right
			snake[i].children[0].rotation = 0;
		} else if (dirX < 0 && dirY === 0) {
			// Moving left
			snake[i].children[0].rotation = Math.PI;
		} else if (dirX === 0 && dirY > 0) {
			// Moving down
			snake[i].children[0].rotation = Math.PI / 2;
		} else if (dirX === 0 && dirY < 0) {
			// Moving up
			snake[i].children[0].rotation = -Math.PI / 2;
		}
	}
	// Move head
	var newHeadPos = gridToWorld(newHeadGrid.x, newHeadGrid.y);
	head.x = newHeadPos.x;
	head.y = newHeadPos.y;
	// Rotate head based on direction
	if (snakeDirection.x === 1 && snakeDirection.y === 0) {
		// Moving right
		head.children[0].rotation = 0;
	} else if (snakeDirection.x === -1 && snakeDirection.y === 0) {
		// Moving left
		head.children[0].rotation = Math.PI;
	} else if (snakeDirection.x === 0 && snakeDirection.y === 1) {
		// Moving down
		head.children[0].rotation = Math.PI / 2;
	} else if (snakeDirection.x === 0 && snakeDirection.y === -1) {
		// Moving up
		head.children[0].rotation = -Math.PI / 2;
	}
	// Check water collection
	for (var i = waterDroplets.length - 1; i >= 0; i--) {
		var water = waterDroplets[i];
		var waterGrid = worldToGrid(water.x, water.y);
		if (waterGrid.x === newHeadGrid.x && waterGrid.y === newHeadGrid.y) {
			// Collect water
			waterCollected++;
			waterTxt.setText('Water: ' + waterCollected);
			LK.setScore(LK.getScore() + 10);
			scoreTxt.setText('Score: ' + LK.getScore());
			// Grow snake - insert new body segment before tail
			var lastSegment = snake[snake.length - 1];
			// Convert current tail to body segment
			if (snake.length > 1) {
				var currentTail = snake[snake.length - 1];
				currentTail.removeChild(currentTail.children[0]);
				var bodyGraphics = currentTail.attachAsset('snakeBody', {
					anchorX: 0.5,
					anchorY: 0.5
				});
			}
			// Create new tail segment
			var newTail = new SnakeSegment(false, true);
			newTail.x = lastSegment.x;
			newTail.y = lastSegment.y;
			snake.push(newTail);
			game.addChild(newTail);
			// Remove water
			water.destroy();
			waterDroplets.splice(i, 1);
			// Play sound
			if (!isMuted) {
				LK.getSound('collect').play();
			}
			// Spawn new water
			spawnWater();
			break;
		}
	}
	// Check heart power-up collection
	for (var i = heartPowerUps.length - 1; i >= 0; i--) {
		var heartPowerUp = heartPowerUps[i];
		var heartGrid = worldToGrid(heartPowerUp.x, heartPowerUp.y);
		if (heartGrid.x === newHeadGrid.x && heartGrid.y === newHeadGrid.y) {
			// Collect heart power-up
			if (lives < 3) {
				lives++;
				updateHearts();
				// Flash effect
				LK.effects.flashObject(head, 0xFF69B4, 300);
				// Play sound
				if (!isMuted) {
					LK.getSound('heartPickup').play();
				}
			}
			// Remove heart power-up
			heartPowerUp.destroy();
			heartPowerUps.splice(i, 1);
			break;
		}
	}
	// Check fire extinguishing - use area-based collision instead of grid-based
	for (var i = fires.length - 1; i >= 0; i--) {
		var fire = fires[i];
		// Calculate fire's collision radius based on size (max 4 grid cells)
		var extinguishCells = Math.min(fire.size, 4);
		var fireRadius = extinguishCells * gridSize / 2;
		// Calculate distance between snake head and fire center
		var deltaX = head.x - fire.x;
		var deltaY = head.y - fire.y;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		// Check if snake head is within fire's area
		if (distance <= fireRadius) {
			if (waterCollected >= fire.waterNeeded) {
				// Create water spray effect
				var spray = new WaterSpray(head.x, head.y, fire.x, fire.y);
				game.addChild(spray);
				// Extinguish fire
				waterCollected -= fire.waterNeeded;
				waterTxt.setText('Water: ' + waterCollected);
				LK.setScore(LK.getScore() + (fire.size === 1 ? 50 : 100));
				scoreTxt.setText('Score: ' + LK.getScore());
				// Remove fire
				fire.destroy();
				fires.splice(i, 1);
				// Play sound
				if (!isMuted) {
					LK.getSound('extinguish').play();
				}
				// Spawn extra water after extinguishing fire
				spawnWater();
				if (waterDroplets.length < 5) {
					spawnWater();
				}
				// Spawn new fire if needed
				if (fires.length < maxFires) {
					spawnFire();
				}
				// Flash effect
				LK.effects.flashObject(head, 0x00FF00, 300);
			} else {
				// Snake burns when touching fire without enough water
				LK.effects.flashObject(head, 0xFF0000, 500);
				// Add burning effect - make snake segments flash and shake
				for (var j = 0; j < snake.length; j++) {
					var segment = snake[j];
					// Flash red with varying intensity
					tween(segment.children[0], {
						tint: 0xFF0000
					}, {
						duration: 200,
						easing: tween.easeInOut,
						onFinish: function onFinish() {
							tween(segment.children[0], {
								tint: 0xFFFFFF
							}, {
								duration: 200,
								easing: tween.easeInOut
							});
						}
					});
					// Shake effect
					var originalX = segment.x;
					var originalY = segment.y;
					tween(segment, {
						x: originalX + (Math.random() - 0.5) * 20,
						y: originalY + (Math.random() - 0.5) * 20
					}, {
						duration: 100,
						easing: tween.easeInOut,
						onFinish: function onFinish() {
							tween(segment, {
								x: originalX,
								y: originalY
							}, {
								duration: 100,
								easing: tween.easeInOut
							});
						}
					});
				}
				gameOver();
				return;
			}
			break;
		}
	}
}
// Change background based on score
function changeBackground() {
	var newLevel = Math.floor(LK.getScore() / 1000);
	if (newLevel !== currentBackgroundLevel && newLevel < backgrounds.length) {
		// Remove old background
		if (backgroundAssets[currentBackgroundLevel]) {
			backgroundAssets[currentBackgroundLevel].destroy();
		}
		// Add new background
		var newBackground = game.attachAsset(backgrounds[newLevel], {
			anchorX: 0,
			anchorY: 0,
			x: 0,
			y: 0
		});
		// Move to back
		game.addChildAt(newBackground, 0);
		backgroundAssets[newLevel] = newBackground;
		currentBackgroundLevel = newLevel;
	}
}
// Update heart display
function updateHearts() {
	for (var i = 0; i < heartIcons.length; i++) {
		if (i < lives) {
			heartIcons[i].alpha = 1.0;
		} else {
			heartIcons[i].alpha = 0.3;
		}
	}
}
// Game over
function gameOver() {
	lives--;
	updateHearts();
	if (lives <= 0) {
		gameRunning = false;
		LK.showGameOver();
	} else {
		// Reset snake position and continue
		LK.effects.flashScreen(0xFF0000, 500);
		// Reset snake to starting position
		var head = snake[0];
		head.x = 5 * gridSize + gridSize / 2;
		head.y = 5 * gridSize + gridSize / 2;
		// Reset direction
		snakeDirection = {
			x: 1,
			y: 0
		};
		nextDirection = {
			x: 1,
			y: 0
		};
	}
}
// Touch controls
game.down = function (x, y, obj) {
	// No need to store touch start position for direct touch controls
};
game.up = function (x, y, obj) {
	if (!gameRunning) {
		return;
	}
	// Get snake head position
	var head = snake[0];
	var snakeX = head.x;
	var snakeY = head.y;
	// Calculate direction from snake head to touch position
	var deltaX = x - snakeX;
	var deltaY = y - snakeY;
	// Turn based on snake's current direction and touch relative position
	if (snakeDirection.x === 1) {
		// Snake moving right
		if (deltaY < 0) {
			// Touch above snake - turn up
			nextDirection = {
				x: 0,
				y: -1
			};
		} else if (deltaY > 0) {
			// Touch below snake - turn down
			nextDirection = {
				x: 0,
				y: 1
			};
		}
	} else if (snakeDirection.x === -1) {
		// Snake moving left
		if (deltaY < 0) {
			// Touch above snake - turn up
			nextDirection = {
				x: 0,
				y: -1
			};
		} else if (deltaY > 0) {
			// Touch below snake - turn down
			nextDirection = {
				x: 0,
				y: 1
			};
		}
	} else if (snakeDirection.y === 1) {
		// Snake moving down
		if (deltaX < 0) {
			// Touch left of snake - turn left
			nextDirection = {
				x: -1,
				y: 0
			};
		} else if (deltaX > 0) {
			// Touch right of snake - turn right
			nextDirection = {
				x: 1,
				y: 0
			};
		}
	} else if (snakeDirection.y === -1) {
		// Snake moving up
		if (deltaX < 0) {
			// Touch left of snake - turn left
			nextDirection = {
				x: -1,
				y: 0
			};
		} else if (deltaX > 0) {
			// Touch right of snake - turn right
			nextDirection = {
				x: 1,
				y: 0
			};
		}
	}
};
// Initialize game
initSnake();
updateHearts();
spawnWater();
spawnWater();
spawnWater();
spawnWater();
spawnFire();
// Start background music
LK.playMusic('bgmusic');
// Game update loop
game.update = function () {
	if (!gameRunning) {
		return;
	}
	moveTimer++;
	if (moveTimer >= moveInterval) {
		moveTimer = 0;
		moveSnake();
	}
	// Spawn additional water periodically
	if (LK.ticks % 80 === 0 && waterDroplets.length < 6) {
		spawnWater();
	}
	// Increase difficulty - add more fires at higher scores
	var currentLevel = Math.floor(LK.getScore() / 300) + 1;
	maxFires = Math.min(currentLevel, 5); // Maximum 5 fires
	if (fires.length < maxFires && LK.ticks % 900 === 0) {
		spawnFire();
	}
	// Spawn heart power-up every 300 points
	if (LK.getScore() > 0 && LK.getScore() % 300 === 0 && LK.ticks % 5 === 0) {
		// Check if we should spawn a heart (only once per 300 point milestone)
		var currentScoreMilestone = Math.floor(LK.getScore() / 300);
		if (!game.lastHeartMilestone || game.lastHeartMilestone < currentScoreMilestone) {
			spawnHeartPowerUp();
			game.lastHeartMilestone = currentScoreMilestone;
		}
	}
	// Clean up dead animals
	for (var i = animals.length - 1; i >= 0; i--) {
		if (animals[i].lifeTime <= 0) {
			animals.splice(i, 1);
		}
	}
	// Clean up expired heart power-ups
	for (var i = heartPowerUps.length - 1; i >= 0; i--) {
		if (heartPowerUps[i].lifeTime <= 0) {
			heartPowerUps.splice(i, 1);
		}
	}
	// Make game slightly faster as score increases - slower acceleration
	if (LK.getScore() > 0 && LK.getScore() % 500 === 0) {
		moveInterval = Math.max(10, moveInterval - 1);
	}
	// Spawn rock obstacles periodically
	if (LK.ticks % 1800 === 0 && rocks.length < 3) {
		spawnRock();
	}
	// Check for background changes every 1000 points
	changeBackground();
};