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

/**** 
* Classes
****/ 
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocity = 0;
	self.gravity = 0.8;
	self.flapStrength = -12;
	self.maxFallSpeed = 15;
	self.rotation = 0;
	self.animationTimer = 0;
	self.invincible = false;
	self.shieldActive = false;
	self.shieldTimer = 0;
	self.speedBoostActive = false;
	self.speedBoostTimer = 0;
	self.trail = [];
	self.flap = function () {
		self.velocity = self.flapStrength;
		LK.getSound('flap').play();
		// Wing flapping animation - quick upward flap
		tween(birdGraphics, {
			scaleY: 1.3,
			scaleX: 0.8
		}, {
			duration: 80,
			easing: tween.easeOut
		});
		tween(birdGraphics, {
			scaleY: 1.0,
			scaleX: 1.0
		}, {
			duration: 120,
			easing: tween.easeIn
		});
		// Slight upward rotation on flap
		tween(birdGraphics, {
			rotation: -0.4
		}, {
			duration: 150,
			easing: tween.easeOut
		});
	};
	self.update = function () {
		// Apply gravity only when game has started
		if (gameStarted && gameActive) {
			// Apply gravity (reduced if speed boost active)
			var currentGravity = self.speedBoostActive ? self.gravity * 0.7 : self.gravity;
			self.velocity += currentGravity;
			// Limit fall speed
			if (self.velocity > self.maxFallSpeed) {
				self.velocity = self.maxFallSpeed;
			}
			// Update position with swooping effect
			self.y += self.velocity;
			// Add swooping animation during fast descent
			if (gameStarted && gameActive && self.velocity > 8) {
				var swoopIntensity = (self.velocity - 8) * 0.02;
				var swoopCycle = Math.sin(LK.ticks * 0.4);
				birdGraphics.x = swoopCycle * swoopIntensity * 10;
				// Wing tucking during fast descent
				tween.stop(birdGraphics, {
					scaleX: true
				});
				tween(birdGraphics, {
					scaleX: 0.8 - swoopIntensity
				}, {
					duration: 200,
					easing: tween.easeOut
				});
			}
		}
		// Smooth rotation based on velocity with gliding effect
		var targetRotation = Math.min(self.velocity * 0.08, 1.2);
		if (self.velocity < 0) {
			targetRotation = Math.max(self.velocity * 0.08, -0.4);
			// Add gliding wing extension when rising
			if (gameStarted && gameActive) {
				var glideIntensity = Math.min(-self.velocity * 0.05, 0.3);
				tween.stop(birdGraphics, {
					scaleX: true
				});
				tween(birdGraphics, {
					scaleX: 1.0 + glideIntensity
				}, {
					duration: 300,
					easing: tween.easeOut
				});
			}
		}
		// Smooth rotation transition
		tween.stop(birdGraphics, {
			rotation: true
		});
		tween(birdGraphics, {
			rotation: targetRotation
		}, {
			duration: 200,
			easing: tween.easeOut
		});
		// Enhanced continuous wing flapping animation when flying
		if (gameStarted && gameActive) {
			self.animationTimer += 0.3;
			var flapCycle = Math.sin(self.animationTimer);
			var fastFlap = Math.sin(self.animationTimer * 2);
			// Wing flapping effect - compress and stretch with double beat
			var flapIntensity = 0.2;
			var microFlap = 0.05;
			birdGraphics.scaleY = 1.0 + flapCycle * flapIntensity + fastFlap * microFlap;
			birdGraphics.scaleX = 1.0 - flapCycle * flapIntensity * 0.7 - fastFlap * microFlap;
			// Add subtle wing position shifts
			var wingShift = Math.cos(self.animationTimer * 1.5) * 0.8;
			birdGraphics.x = wingShift;
		} else {
			// Enhanced floating animation when idle
			if (Math.abs(self.velocity) < 2) {
				self.animationTimer += 0.1;
				var bob = Math.sin(self.animationTimer) * 3;
				var sway = Math.cos(self.animationTimer * 0.7) * 1.5;
				birdGraphics.y = bob;
				birdGraphics.x = sway;
				// Gentle scale breathing effect
				var breathe = Math.sin(self.animationTimer * 0.5) * 0.05 + 1;
				birdGraphics.scaleX = breathe;
				birdGraphics.scaleY = breathe;
			}
		}
		// Update power-up timers
		if (self.shieldActive) {
			self.shieldTimer--;
			if (self.shieldTimer <= 0) {
				self.shieldActive = false;
			}
		}
		if (self.speedBoostActive) {
			self.speedBoostTimer--;
			if (self.speedBoostTimer <= 0) {
				self.speedBoostActive = false;
			}
		}
		// Visual effects for active power-ups
		if (self.shieldActive) {
			var shieldPulse = Math.sin(LK.ticks * 0.2) * 0.3 + 0.7;
			birdGraphics.tint = 0x4488FF;
			birdGraphics.alpha = shieldPulse;
		} else if (self.speedBoostActive) {
			birdGraphics.tint = 0xFF4444;
			birdGraphics.alpha = 0.9;
		} else if (self.invincible) {
			birdGraphics.alpha = 0.5 + 0.5 * Math.sin(LK.ticks * 0.3);
			birdGraphics.tint = 0xFFFFFF;
		} else {
			birdGraphics.alpha = 1;
			birdGraphics.tint = 0xFFFFFF;
		}
		// Add wing trail effect during flapping
		if (gameStarted && gameActive) {
			self.trail.push({
				x: self.x,
				y: self.y,
				life: 15,
				isWingTrail: true
			});
			if (self.trail.length > 12) {
				self.trail.shift();
			}
		} else {
			// Regular trail when not flapping
			self.trail.push({
				x: self.x,
				y: self.y,
				life: 10
			});
			if (self.trail.length > 8) {
				self.trail.shift();
			}
		}
	};
	return self;
});
var Building = Container.expand(function () {
	var self = Container.call(this);
	// Random building height - much taller
	self.buildingHeight = 300 + Math.random() * 400;
	// Create building structure
	var buildingGraphics = self.attachAsset('building', {
		anchorX: 0.5,
		anchorY: 1,
		scaleY: self.buildingHeight / 400,
		scaleX: 1.8 // Same as Building2
	});
	// Add windows to building
	self.windows = [];
	var windowRows = Math.floor(self.buildingHeight / 20); // Same spacing as Building2
	var windowCols = 4; // Same as Building2
	for (var row = 0; row < windowRows; row++) {
		for (var col = 0; col < windowCols; col++) {
			if (Math.random() < 0.7) {
				// 70% chance for lit window
				var window = self.attachAsset('buildingWindow', {
					anchorX: 0.5,
					anchorY: 0.5,
					scaleX: 0.5,
					// Same as Building2
					scaleY: 0.5
				});
				window.x = -135 + col * 90; // Same spacing as Building2
				window.y = -self.buildingHeight + 12 + row * 20; // Same spacing as Building2
				self.windows.push(window);
			}
		}
	}
	self.speed = -2;
	self.update = function () {
		self.x += self.speed;
		// Flicker windows randomly
		for (var i = 0; i < self.windows.length; i++) {
			if (Math.random() < 0.01) {
				// 1% chance to flicker
				self.windows[i].alpha = Math.random() < 0.5 ? 0.3 : 1.0;
			}
			// Add flying/flapping animation to windows
			if (Math.random() < 0.005) {
				// 0.5% chance for window to "fly" with wing-like animation
				var window = self.windows[i];
				// Wing flap animation - quick scale change
				tween(window, {
					scaleX: 1.5,
					scaleY: 0.8,
					rotation: 0.2
				}, {
					duration: 200,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						tween(window, {
							scaleX: 1.0,
							scaleY: 1.0,
							rotation: 0
						}, {
							duration: 300,
							easing: tween.easeInOut
						});
					}
				});
			}
		}
	};
	return self;
});
var Building2 = Container.expand(function () {
	var self = Container.call(this);
	// Same building height range as Building - much taller
	self.buildingHeight = 300 + Math.random() * 400;
	// Create building structure with different scaling
	var buildingGraphics = self.attachAsset('building', {
		anchorX: 0.5,
		anchorY: 1,
		scaleY: self.buildingHeight / 400,
		scaleX: 1.8 // Larger than Building 1
	});
	// Tint building slightly different color
	buildingGraphics.tint = 0xCCCCCC;
	// Add windows to building with different pattern
	self.windows = [];
	var windowRows = Math.floor(self.buildingHeight / 20); // Closer spacing
	var windowCols = 4; // Fewer columns for smaller building
	for (var row = 0; row < windowRows; row++) {
		for (var col = 0; col < windowCols; col++) {
			if (Math.random() < 0.8) {
				// 80% chance for lit window
				var window = self.attachAsset('buildingWindow', {
					anchorX: 0.5,
					anchorY: 0.5,
					scaleX: 0.5,
					scaleY: 0.5
				});
				window.x = -135 + col * 90; // Adjusted spacing for larger building
				window.y = -self.buildingHeight + 12 + row * 20;
				// Random window colors for variety
				var windowColors = [0xFFFF88, 0x88FFFF, 0xFF88FF, 0xFFFFFF];
				window.tint = windowColors[Math.floor(Math.random() * windowColors.length)];
				self.windows.push(window);
			}
		}
	}
	self.speed = -2;
	self.update = function () {
		self.x += self.speed;
		// Different flicker pattern - faster flicker
		for (var i = 0; i < self.windows.length; i++) {
			if (Math.random() < 0.02) {
				// 2% chance to flicker (faster than Building)
				self.windows[i].alpha = Math.random() < 0.3 ? 0.2 : 1.0;
			}
			// Add flying/flapping animation to Building2 windows with different pattern
			if (Math.random() < 0.008) {
				// 0.8% chance for window to "fly" with butterfly-like animation
				var window = self.windows[i];
				// Butterfly wing flap animation - more elegant movement
				tween(window, {
					scaleX: 1.3,
					scaleY: 1.4,
					rotation: -0.3,
					y: window.y - 10
				}, {
					duration: 150,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						tween(window, {
							scaleX: 0.9,
							scaleY: 1.1,
							rotation: 0.3,
							y: window.y + 5
						}, {
							duration: 180,
							easing: tween.easeInOut,
							onFinish: function onFinish() {
								tween(window, {
									scaleX: 1.0,
									scaleY: 1.0,
									rotation: 0,
									y: window.y
								}, {
									duration: 220,
									easing: tween.easeIn
								});
							}
						});
					}
				});
			}
		}
	};
	return self;
});
var Cloud = Container.expand(function () {
	var self = Container.call(this);
	var cloudGraphics = self.attachAsset('cloud', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -1;
	self.update = function () {
		self.x += self.speed;
		// Reset position when off screen
		if (self.x < -200) {
			self.x = 2048 + 200;
			self.y = 100 + Math.random() * 300;
		}
	};
	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 = -4;
	self.collected = false;
	self.update = function () {
		self.x += self.speed;
		// Simple rotation animation
		coinGraphics.rotation += 0.1;
	};
	self.checkCollection = function (bird) {
		var distance = Math.sqrt(Math.pow(bird.x - self.x, 2) + Math.pow(bird.y - self.y, 2));
		return distance < 35; // Collection radius
	};
	return self;
});
var Monkey = Container.expand(function () {
	var self = Container.call(this);
	var monkeyGraphics = self.attachAsset('monkey', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -1.5;
	self.verticalSpeed = 0;
	self.bounceHeight = 50;
	self.animationTimer = 0;
	self.direction = 1; // 1 for right, -1 for left
	self.baseY = 0;
	self.update = function () {
		// Horizontal movement - only right
		self.x += Math.abs(self.speed);
		// Bouncing animation
		self.animationTimer += 0.08;
		self.y = self.baseY + Math.sin(self.animationTimer) * self.bounceHeight;
		// Reset position when off screen
		if (self.x > 2048 + 100) {
			self.x = -100;
			self.baseY = 200 + Math.random() * 400;
		}
	};
	return self;
});
var Particle = Container.expand(function () {
	var self = Container.call(this);
	var particleGraphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.life = 60;
	self.maxLife = 60;
	self.gravity = 0.2;
	self.update = function () {
		self.x += self.velocityX;
		self.y += self.velocityY;
		self.velocityY += self.gravity;
		self.life--;
		// Fade out over time
		var alpha = self.life / self.maxLife;
		particleGraphics.alpha = alpha;
		particleGraphics.scaleX = alpha * 0.5;
		particleGraphics.scaleY = alpha * 0.5;
		// Rotation
		particleGraphics.rotation += 0.1;
	};
	return self;
});
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	self.gapHeight = 260;
	self.speed = -4;
	self.scored = false;
	// Create top pipe
	self.topPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Create bottom pipe
	self.bottomPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0
	});
	// Add pipe caps for authentic look
	self.topCap = LK.getAsset('pipe', {
		anchorX: 0.5,
		anchorY: 1,
		scaleX: 1.2,
		scaleY: 0.1
	});
	self.bottomCap = LK.getAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0,
		scaleX: 1.2,
		scaleY: 0.1
	});
	self.addChild(self.topCap);
	self.addChild(self.bottomCap);
	self.setupPipes = function (gapCenterY) {
		self.topPipe.y = gapCenterY - self.gapHeight / 2;
		self.bottomPipe.y = gapCenterY + self.gapHeight / 2;
		self.topCap.y = self.topPipe.y;
		self.bottomCap.y = self.bottomPipe.y;
	};
	self.update = function () {
		self.x += self.speed;
	};
	self.checkCollision = function (bird) {
		var birdRadius = 30;
		var pipeWidth = 62;
		var birdBounds = {
			left: bird.x - birdRadius,
			right: bird.x + birdRadius,
			top: bird.y - birdRadius,
			bottom: bird.y + birdRadius
		};
		var pipeBounds = {
			left: self.x - pipeWidth,
			right: self.x + pipeWidth,
			topBottom: self.topPipe.y,
			bottomTop: self.bottomPipe.y
		};
		// Check if bird is within pipe horizontal bounds
		if (birdBounds.right > pipeBounds.left && birdBounds.left < pipeBounds.right) {
			// Check collision with top or bottom pipe
			if (birdBounds.top < pipeBounds.topBottom || birdBounds.bottom > pipeBounds.bottomTop) {
				return true;
			}
		}
		return false;
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	powerUpGraphics.tint = 0xFF4444; // Red tint for power-up
	self.speed = -4;
	self.collected = false;
	self.type = 'shield'; // shield, speed, score
	self.animationTimer = 0;
	self.update = function () {
		self.x += self.speed;
		self.animationTimer += 0.1;
		// Pulsing animation
		var pulse = Math.sin(self.animationTimer) * 0.3 + 1;
		powerUpGraphics.scaleX = pulse;
		powerUpGraphics.scaleY = pulse;
		// Rotation
		powerUpGraphics.rotation += 0.05;
		// Glowing effect
		var glow = Math.sin(self.animationTimer * 2) * 0.3 + 0.7;
		powerUpGraphics.alpha = glow;
	};
	self.checkCollection = function (bird) {
		var distance = Math.sqrt(Math.pow(bird.x - self.x, 2) + Math.pow(bird.y - self.y, 2));
		return distance < 40;
	};
	return self;
});
var SpawnPoint = Container.expand(function () {
	var self = Container.call(this);
	self.isActive = true;
	self.spawnType = 'pipe'; // 'pipe' or 'coin'
	self.cooldownTimer = 0;
	self.cooldownDuration = 60; // 1 second at 60fps
	// Create visual marker for spawn point
	var marker = LK.getAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.5,
		scaleY: 0.5
	});
	self.addChild(marker);
	self.marker = marker;
	self.update = function () {
		if (self.cooldownTimer > 0) {
			self.cooldownTimer--;
			self.marker.alpha = 0.3; // Dim when on cooldown
		} else {
			self.marker.alpha = 1.0; // Bright when ready
		}
		// Pulse animation
		self.marker.rotation += 0.05;
		var pulse = Math.sin(LK.ticks * 0.1) * 0.1 + 1;
		self.marker.scaleX = 0.5 * pulse;
		self.marker.scaleY = 0.5 * pulse;
	};
	self.canSpawn = function () {
		return self.isActive && self.cooldownTimer <= 0;
	};
	self.triggerSpawn = function () {
		if (self.canSpawn()) {
			self.cooldownTimer = self.cooldownDuration;
			return true;
		}
		return false;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var bird;
var pipes = [];
var coins = [];
var spawnPoints = [];
var clouds = [];
var monkeys = [];
var particles = [];
var powerUps = [];
var buildings = [];
var buildings2 = [];
var ground;
var gameStarted = false;
var gameActive = true;
var pipeSpawnTimer = 0;
var pipeSpawnInterval = 150; // 2.5 seconds at 60fps
var buildingSpawnTimer = 0;
var buildingSpawnInterval = 200; // 3.33 seconds at 60fps
var building2SpawnTimer = 0;
var building2SpawnInterval = 280; // 4.67 seconds at 60fps
var playerHealth = 3;
var bestScore = 0;
var dayTime = true;
var lastColorChangeScore = 0;
var currentSkin = 0;
var skinShowMode = false;
var currentWeather = 0;
var weatherChangeTimer = 0;
var weatherChangeInterval = 1800; // 30 seconds at 60fps
var comboMultiplier = 1;
var comboTimer = 0;
var difficultyLevel = 1;
var weatherTypes = [{
	name: 'Sunny',
	bgColor: 0x87CEEB,
	cloudAlpha: 0.8,
	cloudSpeed: 1
}, {
	name: 'Cloudy',
	bgColor: 0x708090,
	cloudAlpha: 1.0,
	cloudSpeed: 1.5
}, {
	name: 'Stormy',
	bgColor: 0x2F4F4F,
	cloudAlpha: 1.2,
	cloudSpeed: 2.0
}, {
	name: 'Sunset',
	bgColor: 0xFF6B35,
	cloudAlpha: 0.9,
	cloudSpeed: 0.8
}, {
	name: 'Night',
	bgColor: 0x191970,
	cloudAlpha: 0.6,
	cloudSpeed: 0.5
}];
var skins = [{
	name: 'Classic',
	asset: 'bird'
}, {
	name: 'Red Fire',
	asset: 'bird_red'
}, {
	name: 'Blue Ice',
	asset: 'bird_blue'
}, {
	name: 'Green Forest',
	asset: 'bird_green'
}, {
	name: 'Golden King',
	asset: 'bird_golden'
}];
// Create score display
var scoreTxt = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Create health display
var healthTxt = new Text2('♥ ♥ ♥', {
	size: 60,
	fill: 0xFF0000
});
healthTxt.anchor.set(1, 0);
healthTxt.x = -20; // Position from right edge
healthTxt.y = 20;
LK.gui.topRight.addChild(healthTxt);
// Create weather display
var weatherTxt = new Text2('Weather: Sunny', {
	size: 40,
	fill: 0xFFFFFF
});
weatherTxt.anchor.set(0, 0);
weatherTxt.x = 20;
weatherTxt.y = 20;
LK.gui.topLeft.addChild(weatherTxt);
// Create combo display
var comboTxt = new Text2('', {
	size: 50,
	fill: 0xFFD700
});
comboTxt.anchor.set(0.5, 0);
comboTxt.x = 0;
comboTxt.y = 100;
LK.gui.top.addChild(comboTxt);
// Create game title
var titleTxt = new Text2('FLAPPY BIRD', {
	size: 120,
	fill: 0xFFD700
});
titleTxt.anchor.set(0.5, 0.5);
titleTxt.x = 2048 / 2;
titleTxt.y = 2732 / 2 - 400;
titleTxt.alpha = 0;
game.addChild(titleTxt);
// Create subtitle text under title
var subtitleTxt = new Text2('Tap to Fly Through Pipes', {
	size: 50,
	fill: 0xFFFFFF
});
subtitleTxt.anchor.set(0.5, 0.5);
subtitleTxt.x = 2048 / 2;
subtitleTxt.y = 2732 / 2 - 320;
subtitleTxt.alpha = 0;
game.addChild(subtitleTxt);
// Create best score display
var bestScoreTxt = new Text2('BEST: 0', {
	size: 45,
	fill: 0xFFD700
});
bestScoreTxt.anchor.set(0.5, 0.5);
bestScoreTxt.x = 2048 / 2;
bestScoreTxt.y = 2732 / 2 - 100;
bestScoreTxt.alpha = 0;
game.addChild(bestScoreTxt);
// Create shared start/skin button
var skinBtn = new Text2('START / SKINS', {
	size: 50,
	fill: 0xFFFFFF
});
skinBtn.anchor.set(0.5, 0.5);
skinBtn.x = 2048 / 2;
skinBtn.y = 2732 / 2 + 50;
skinBtn.alpha = 0;
game.addChild(skinBtn);
// Create skin button background
var skinBtnBg = LK.getAsset('startButton', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 0.8,
	scaleY: 0.6
});
skinBtnBg.x = 2048 / 2;
skinBtnBg.y = 2732 / 2 + 50;
skinBtnBg.alpha = 0;
game.addChild(skinBtnBg);
var skinBtnBorder = LK.getAsset('startButtonBorder', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 0.8,
	scaleY: 0.6
});
skinBtnBorder.x = 2048 / 2;
skinBtnBorder.y = 2732 / 2 + 50;
skinBtnBorder.alpha = 0;
game.addChild(skinBtnBorder);
// Create skin selection UI
var skinTitleTxt = new Text2('SELECT SKIN', {
	size: 80,
	fill: 0xFFD700
});
skinTitleTxt.anchor.set(0.5, 0.5);
skinTitleTxt.x = 2048 / 2;
skinTitleTxt.y = 400;
skinTitleTxt.alpha = 0;
skinTitleTxt.visible = false;
game.addChild(skinTitleTxt);
var skinNameTxt = new Text2('Classic', {
	size: 60,
	fill: 0xFFFFFF
});
skinNameTxt.anchor.set(0.5, 0.5);
skinNameTxt.x = 2048 / 2;
skinNameTxt.y = 2732 / 2 - 100;
skinNameTxt.alpha = 0;
skinNameTxt.visible = false;
game.addChild(skinNameTxt);
var prevBtn = new Text2('< PREV', {
	size: 50,
	fill: 0xFFFFFF
});
prevBtn.anchor.set(0.5, 0.5);
prevBtn.x = 2048 / 2 - 200;
prevBtn.y = 2732 / 2 + 100;
prevBtn.alpha = 0;
prevBtn.visible = false;
game.addChild(prevBtn);
var nextBtn = new Text2('NEXT >', {
	size: 50,
	fill: 0xFFFFFF
});
nextBtn.anchor.set(0.5, 0.5);
nextBtn.x = 2048 / 2 + 200;
nextBtn.y = 2732 / 2 + 100;
nextBtn.alpha = 0;
nextBtn.visible = false;
game.addChild(nextBtn);
var backBtn = new Text2('BACK', {
	size: 50,
	fill: 0xFF4444
});
backBtn.anchor.set(0.5, 0.5);
backBtn.x = 2048 / 2;
backBtn.y = 2732 / 2 + 200;
backBtn.alpha = 0;
backBtn.visible = false;
game.addChild(backBtn);
var skinPreviewBird = new Bird();
skinPreviewBird.x = 2048 / 2;
skinPreviewBird.y = 2732 / 2;
skinPreviewBird.alpha = 0;
skinPreviewBird.visible = false;
game.addChild(skinPreviewBird);
// Cascade entrance animations for starting screen
tween(titleTxt, {
	alpha: 1,
	scaleX: 1.2,
	scaleY: 1.2
}, {
	duration: 1000,
	easing: tween.bounceOut
});
LK.setTimeout(function () {
	// Animation slot reserved for future use
}, 300);
LK.setTimeout(function () {
	tween(bestScoreTxt, {
		alpha: 1
	}, {
		duration: 800,
		easing: tween.easeOut
	});
	tween(subtitleTxt, {
		alpha: 1
	}, {
		duration: 600,
		easing: tween.easeOut
	});
}, 900);
LK.setTimeout(function () {
	tween(skinBtnBorder, {
		alpha: 0.9,
		scaleX: 0.84,
		scaleY: 0.63
	}, {
		duration: 800,
		easing: tween.bounceOut
	});
	tween(skinBtnBg, {
		alpha: 1,
		scaleX: 0.8,
		scaleY: 0.6
	}, {
		duration: 800,
		easing: tween.bounceOut
	});
	tween(skinBtn, {
		alpha: 1
	}, {
		duration: 1000,
		easing: tween.easeInOut
	});
}, 1200);
// Title floating animation removed
// Update best score display with stored value
var storedBestScore = LK.getScore() || 0;
bestScoreTxt.setText('BEST: ' + storedBestScore);
// Create decorative sparkles for starting screen
var sparkles = [];
for (var i = 0; i < 8; i++) {
	var sparkle = LK.getAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.3,
		scaleY: 0.3,
		alpha: 0
	});
	sparkle.x = 2048 / 2 + (Math.random() - 0.5) * 600;
	sparkle.y = 2732 / 2 - 350 + (Math.random() - 0.5) * 200;
	sparkles.push(sparkle);
	game.addChild(sparkle);
}
// Animate sparkles
function animateSparkles() {
	for (var i = 0; i < sparkles.length; i++) {
		var sparkle = sparkles[i];
		var delay = i * 200;
		LK.setTimeout(function (s) {
			return function () {
				tween(s, {
					alpha: 1,
					rotation: Math.PI * 2,
					scaleX: 0.5,
					scaleY: 0.5
				}, {
					duration: 1000,
					easing: tween.easeInOut,
					onFinish: function onFinish() {
						tween(s, {
							alpha: 0,
							scaleX: 0.3,
							scaleY: 0.3
						}, {
							duration: 500,
							easing: tween.easeIn
						});
					}
				});
			};
		}(sparkle), delay);
	}
}
LK.setTimeout(animateSparkles, 2000);
// Initialize bird
bird = new Bird();
bird.x = -100; // Start off screen
bird.y = 2732 / 2;
bird.invincible = false;
game.addChild(bird);
// Apply current skin
bird.removeChildren();
var initialBirdGraphics = bird.attachAsset(skins[currentSkin].asset, {
	anchorX: 0.5,
	anchorY: 0.5
});
// Smooth entrance animation
tween(bird, {
	x: 2048 / 4
}, {
	duration: 1000,
	easing: tween.easeOut,
	onFinish: function onFinish() {
		// Floating animation removed
		// Rotation floating animation removed
	}
});
// Initialize health display
updateHealthDisplay();
// Initialize clouds
for (var i = 0; i < 4; i++) {
	var cloud = new Cloud();
	cloud.x = i * 500 + 200;
	cloud.y = 100 + Math.random() * 300;
	clouds.push(cloud);
	game.addChild(cloud);
}
// Initialize monkeys
var monkey = new Monkey();
monkey.x = 2048 + 300;
monkey.baseY = 200 + Math.random() * 400;
monkey.y = monkey.baseY;
monkeys.push(monkey);
game.addChild(monkey);
// Initialize spawn points
for (var i = 0; i < 3; i++) {
	var spawnPoint = new SpawnPoint();
	spawnPoint.x = 2048 + 200 + i * 400;
	spawnPoint.y = 300 + i * 200;
	spawnPoints.push(spawnPoint);
	game.addChild(spawnPoint);
}
// Initialize first few buildings
for (var i = 0; i < 3; i++) {
	var building = new Building();
	building.x = 300 + i * 300;
	building.y = 2732 - 100;
	buildings.push(building);
	game.addChildAt(building, 0);
}
// Initialize first few Building2 instances
for (var i = 0; i < 2; i++) {
	var building2 = new Building2();
	building2.x = 600 + i * 400;
	building2.y = 2732 - 100;
	buildings2.push(building2);
	game.addChildAt(building2, 0);
}
// Create ground
ground = game.attachAsset('ground', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 2732 - 100
});
// Add ground scrolling animation
tween(ground, {
	x: -200
}, {
	duration: 4000,
	easing: tween.linear,
	onFinish: function onFinish() {
		ground.x = 0;
		tween(ground, {
			x: -200
		}, {
			duration: 4000,
			easing: tween.linear,
			onFinish: arguments.callee
		});
	}
});
function spawnPipe() {
	var pipe = new Pipe();
	pipe.x = 2048 + 100; // Start from right edge
	pipe.alpha = 1; // Start visible
	// Vary gap center position - keep it challenging but fair
	var baseY = 2732 / 2;
	var variation = 400;
	var gapCenterY = baseY + (Math.random() - 0.5) * variation;
	// Keep within reasonable bounds
	gapCenterY = Math.max(400, Math.min(2332, gapCenterY));
	pipe.setupPipes(gapCenterY);
	pipes.push(pipe);
	// Add pipe at index 0 to ensure it stays behind buildings
	game.addChildAt(pipe, 0);
	// Spawn coin in the gap center (70% chance)
	if (Math.random() < 0.7) {
		var coin = new Coin();
		coin.x = pipe.x;
		coin.y = gapCenterY;
		coin.alpha = 0;
		coins.push(coin);
		game.addChild(coin);
		// Coin entrance animation with slight delay
		tween(coin, {
			alpha: 1,
			scaleX: 1.2,
			scaleY: 1.2
		}, {
			duration: 300,
			easing: tween.bounceOut,
			onFinish: function onFinish() {
				tween(coin, {
					scaleX: 1.0,
					scaleY: 1.0
				}, {
					duration: 200,
					easing: tween.easeOut
				});
			}
		});
	}
	// Spawn power-up occasionally (15% chance)
	if (Math.random() < 0.15) {
		var powerUp = new PowerUp();
		powerUp.x = pipe.x + 100;
		powerUp.y = gapCenterY + (Math.random() - 0.5) * 100;
		powerUps.push(powerUp);
		game.addChild(powerUp);
	}
}
function spawnBuilding() {
	var building = new Building();
	building.x = 2048 + 100; // Start from right edge
	building.y = 2732 - 100; // Position on ground
	buildings.push(building);
	// Add building at index 0 to ensure it stays behind pipes and other game elements
	game.addChildAt(building, 0);
}
function spawnBuilding2() {
	var building2 = new Building2();
	building2.x = 2048 + 150; // Start from right edge with slight offset
	building2.y = 2732 - 100; // Position on ground
	buildings2.push(building2);
	// Add building at index 0 to ensure it stays behind pipes and other game elements
	game.addChildAt(building2, 0);
}
function checkScore() {
	for (var i = 0; i < pipes.length; i++) {
		var pipe = pipes[i];
		if (!pipe.scored && pipe.x < bird.x) {
			pipe.scored = true;
			var points = Math.floor(1 * comboMultiplier);
			LK.setScore(LK.getScore() + points);
			scoreTxt.setText(LK.getScore().toString());
			LK.getSound('score').play();
			// Update combo display
			if (comboMultiplier > 1) {
				comboTxt.setText('COMBO x' + comboMultiplier.toFixed(1));
				tween(comboTxt, {
					scaleX: 1.3,
					scaleY: 1.3
				}, {
					duration: 150,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						tween(comboTxt, {
							scaleX: 1.0,
							scaleY: 1.0
						}, {
							duration: 150,
							easing: tween.easeOut
						});
					}
				});
			} else {
				comboTxt.setText('');
			}
			// Score animation
			tween(scoreTxt, {
				scaleX: 1.3,
				scaleY: 1.3
			}, {
				duration: 150,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					tween(scoreTxt, {
						scaleX: 1.0,
						scaleY: 1.0
					}, {
						duration: 150,
						easing: tween.easeOut
					});
				}
			});
		}
	}
}
function updateHealthDisplay() {
	var hearts = '';
	for (var i = 0; i < playerHealth; i++) {
		hearts += '♥ ';
	}
	for (var i = playerHealth; i < 3; i++) {
		hearts += '♡ ';
	}
	healthTxt.setText(hearts.trim());
}
function spawnParticles(x, y, count, color) {
	for (var i = 0; i < count; i++) {
		var particle = new Particle();
		particle.x = x + (Math.random() - 0.5) * 40;
		particle.y = y + (Math.random() - 0.5) * 40;
		particle.velocityX = (Math.random() - 0.5) * 8;
		particle.velocityY = (Math.random() - 0.5) * 8 - 2;
		if (color) {
			particle.children[0].tint = color;
		}
		particles.push(particle);
		game.addChild(particle);
	}
}
function checkCoinCollection() {
	for (var i = coins.length - 1; i >= 0; i--) {
		var coin = coins[i];
		if (!coin.collected && coin.checkCollection(bird)) {
			coin.collected = true;
			var points = 5 * comboMultiplier;
			LK.setScore(LK.getScore() + points);
			scoreTxt.setText(LK.getScore().toString());
			LK.getSound('score').play();
			// Spawn particle effects
			spawnParticles(coin.x, coin.y, 6, 0xFFD700);
			// Increase combo
			comboMultiplier = Math.min(5, comboMultiplier + 0.5);
			comboTimer = 180; // 3 seconds
			coin.destroy();
			coins.splice(i, 1);
		}
	}
}
function checkPowerUpCollection() {
	for (var i = powerUps.length - 1; i >= 0; i--) {
		var powerUp = powerUps[i];
		if (!powerUp.collected && powerUp.checkCollection(bird)) {
			powerUp.collected = true;
			// Apply power-up effect
			if (powerUp.type === 'shield') {
				bird.shieldActive = true;
				bird.shieldTimer = 300; // 5 seconds
			} else if (powerUp.type === 'speed') {
				bird.speedBoostActive = true;
				bird.speedBoostTimer = 180; // 3 seconds
			}
			LK.getSound('score').play();
			spawnParticles(powerUp.x, powerUp.y, 8, 0xFF4444);
			powerUp.destroy();
			powerUps.splice(i, 1);
		}
	}
}
function checkCollisions() {
	// Check pipe collisions
	for (var i = 0; i < pipes.length; i++) {
		if (pipes[i].checkCollision(bird)) {
			return true;
		}
	}
	// Check ground collision
	if (bird.y + 30 > ground.y) {
		return true;
	}
	// Check ceiling collision
	if (bird.y - 30 < 0) {
		return true;
	}
	return false;
}
function takeDamage() {
	if (playerHealth > 0) {
		playerHealth--;
		updateHealthDisplay();
		// Flash screen red to indicate damage
		LK.effects.flashScreen(0xff0000, 500);
		LK.getSound('hit').play();
		// Make bird temporarily invincible
		bird.invincible = true;
		// Remove invincibility after 2 seconds
		LK.setTimeout(function () {
			bird.invincible = false;
		}, 2000);
		// Check if health is depleted
		if (playerHealth <= 0) {
			gameOver();
		}
	}
}
function gameOver() {
	gameActive = false;
	LK.getSound('hit').play();
	// Stop bird movement
	bird.velocity = 0;
	// Flash screen red
	LK.effects.flashScreen(0xff0000, 1000);
	// Show game over after a brief delay
	LK.setTimeout(function () {
		LK.showGameOver();
	}, 500);
}
function showSkinSelection() {
	skinShowMode = true;
	// Hide main menu elements
	titleTxt.visible = false;
	subtitleTxt.visible = false;
	bestScoreTxt.visible = false;
	skinBtn.visible = false;
	skinBtnBg.visible = false;
	skinBtnBorder.visible = false;
	for (var i = 0; i < sparkles.length; i++) {
		sparkles[i].visible = false;
	}
	// Show skin selection elements
	skinTitleTxt.visible = true;
	skinNameTxt.visible = true;
	prevBtn.visible = true;
	nextBtn.visible = true;
	backBtn.visible = true;
	skinPreviewBird.visible = true;
	// Animate skin UI entrance
	tween(skinTitleTxt, {
		alpha: 1
	}, {
		duration: 500,
		easing: tween.easeOut
	});
	tween(skinNameTxt, {
		alpha: 1
	}, {
		duration: 500,
		easing: tween.easeOut
	});
	tween(prevBtn, {
		alpha: 1
	}, {
		duration: 500,
		easing: tween.easeOut
	});
	tween(nextBtn, {
		alpha: 1
	}, {
		duration: 500,
		easing: tween.easeOut
	});
	tween(backBtn, {
		alpha: 1
	}, {
		duration: 500,
		easing: tween.easeOut
	});
	tween(skinPreviewBird, {
		alpha: 1
	}, {
		duration: 500,
		easing: tween.easeOut
	});
	updateSkinPreview();
}
function hideSkinSelection() {
	skinShowMode = false;
	// Hide skin selection elements
	tween(skinTitleTxt, {
		alpha: 0
	}, {
		duration: 300,
		easing: tween.easeIn,
		onFinish: function onFinish() {
			skinTitleTxt.visible = false;
		}
	});
	tween(skinNameTxt, {
		alpha: 0
	}, {
		duration: 300,
		easing: tween.easeIn,
		onFinish: function onFinish() {
			skinNameTxt.visible = false;
		}
	});
	tween(prevBtn, {
		alpha: 0
	}, {
		duration: 300,
		easing: tween.easeIn,
		onFinish: function onFinish() {
			prevBtn.visible = false;
			if (gameStarted) prevBtn.destroy();
		}
	});
	tween(nextBtn, {
		alpha: 0
	}, {
		duration: 300,
		easing: tween.easeIn,
		onFinish: function onFinish() {
			nextBtn.visible = false;
			if (gameStarted) nextBtn.destroy();
		}
	});
	tween(backBtn, {
		alpha: 0
	}, {
		duration: 300,
		easing: tween.easeIn,
		onFinish: function onFinish() {
			backBtn.visible = false;
			if (gameStarted) backBtn.destroy();
		}
	});
	tween(skinPreviewBird, {
		alpha: 0
	}, {
		duration: 300,
		easing: tween.easeIn,
		onFinish: function onFinish() {
			skinPreviewBird.visible = false;
		}
	});
	// Show main menu elements
	LK.setTimeout(function () {
		titleTxt.visible = true;
		subtitleTxt.visible = true;
		bestScoreTxt.visible = true;
		skinBtn.visible = true;
		skinBtnBg.visible = true;
		skinBtnBorder.visible = true;
		for (var i = 0; i < sparkles.length; i++) {
			sparkles[i].visible = true;
		}
		tween(titleTxt, {
			alpha: 1
		}, {
			duration: 500,
			easing: tween.easeOut
		});
		tween(subtitleTxt, {
			alpha: 1
		}, {
			duration: 500,
			easing: tween.easeOut
		});
		tween(bestScoreTxt, {
			alpha: 1
		}, {
			duration: 500,
			easing: tween.easeOut
		});
		tween(skinBtnBorder, {
			alpha: 0.9
		}, {
			duration: 500,
			easing: tween.easeOut
		});
		tween(skinBtnBg, {
			alpha: 1
		}, {
			duration: 500,
			easing: tween.easeOut
		});
		tween(skinBtn, {
			alpha: 1
		}, {
			duration: 500,
			easing: tween.easeOut
		});
	}, 300);
}
function updateSkinPreview() {
	var skin = skins[currentSkin];
	skinNameTxt.setText(skin.name);
	// Update preview bird skin
	skinPreviewBird.removeChildren();
	var newBirdGraphics = skinPreviewBird.attachAsset(skin.asset, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Floating animation removed from preview bird
}
function changeSkin(direction) {
	currentSkin += direction;
	if (currentSkin < 0) {
		currentSkin = skins.length - 1;
	} else if (currentSkin >= skins.length) {
		currentSkin = 0;
	}
	updateSkinPreview();
	// Update actual bird skin
	bird.removeChildren();
	var newBirdGraphics = bird.attachAsset(skins[currentSkin].asset, {
		anchorX: 0.5,
		anchorY: 0.5
	});
}
function changeWeather() {
	currentWeather = (currentWeather + 1) % weatherTypes.length;
	var weather = weatherTypes[currentWeather];
	// Smooth background color transition
	var currentColor = game.backgroundColor;
	var newColor = weather.bgColor;
	var steps = 120; // 2 second transition
	var stepCount = 0;
	var transitionColor = function transitionColor() {
		if (stepCount < steps) {
			var t = stepCount / steps;
			var r1 = currentColor >> 16 & 0xFF;
			var g1 = currentColor >> 8 & 0xFF;
			var b1 = currentColor & 0xFF;
			var r2 = newColor >> 16 & 0xFF;
			var g2 = newColor >> 8 & 0xFF;
			var b2 = newColor & 0xFF;
			var r = Math.floor(r1 + (r2 - r1) * t);
			var g = Math.floor(g1 + (g2 - g1) * t);
			var b = Math.floor(b1 + (b2 - b1) * t);
			game.setBackgroundColor(r << 16 | g << 8 | b);
			stepCount++;
		}
	};
	var colorTransitionInterval = LK.setInterval(transitionColor, 16);
	LK.setTimeout(function () {
		LK.clearInterval(colorTransitionInterval);
	}, 2000);
	// Update cloud properties for weather effect
	for (var i = 0; i < clouds.length; i++) {
		var cloud = clouds[i];
		cloud.speed = -weather.cloudSpeed;
		tween(cloud, {
			alpha: weather.cloudAlpha
		}, {
			duration: 2000,
			easing: tween.easeInOut
		});
	}
	// Update weather display
	weatherTxt.setText('Weather: ' + weather.name);
	// Add weather-specific visual effects
	if (weather.name === 'Stormy') {
		// Screen flash effect for lightning
		LK.setTimeout(function () {
			LK.effects.flashScreen(0xFFFFFF, 200);
		}, 1000);
	}
}
// Touch/tap handler
game.down = function (x, y, obj) {
	if (!gameStarted) {
		// Floating animations removed
		if (skinShowMode) {
			// Check skin selection UI clicks
			var prevBounds = {
				left: prevBtn.x - 75,
				right: prevBtn.x + 75,
				top: prevBtn.y - 30,
				bottom: prevBtn.y + 30
			};
			var nextBounds = {
				left: nextBtn.x - 75,
				right: nextBtn.x + 75,
				top: nextBtn.y - 30,
				bottom: nextBtn.y + 30
			};
			var backBounds = {
				left: backBtn.x - 50,
				right: backBtn.x + 50,
				top: backBtn.y - 30,
				bottom: backBtn.y + 30
			};
			if (x >= prevBounds.left && x <= prevBounds.right && y >= prevBounds.top && y <= prevBounds.bottom) {
				// Previous skin button
				tween(prevBtn, {
					scaleX: 0.9,
					scaleY: 0.9
				}, {
					duration: 100,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						tween(prevBtn, {
							scaleX: 1.0,
							scaleY: 1.0
						}, {
							duration: 100,
							easing: tween.easeOut
						});
					}
				});
				changeSkin(-1);
				// Hide skin selection panel after skin is chosen
				hideSkinSelection();
				return;
			} else if (x >= nextBounds.left && x <= nextBounds.right && y >= nextBounds.top && y <= nextBounds.bottom) {
				// Next skin button
				tween(nextBtn, {
					scaleX: 0.9,
					scaleY: 0.9
				}, {
					duration: 100,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						tween(nextBtn, {
							scaleX: 1.0,
							scaleY: 1.0
						}, {
							duration: 100,
							easing: tween.easeOut
						});
					}
				});
				changeSkin(1);
				// Hide skin selection panel after skin is chosen
				hideSkinSelection();
				return;
			} else if (x >= backBounds.left && x <= backBounds.right && y >= backBounds.top && y <= backBounds.bottom) {
				// Back button - return to main menu only
				tween(backBtn, {
					scaleX: 0.9,
					scaleY: 0.9
				}, {
					duration: 100,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						tween(backBtn, {
							scaleX: 1.0,
							scaleY: 1.0
						}, {
							duration: 100,
							easing: tween.easeOut
						});
					}
				});
				// Hide skin selection and return to main menu
				hideSkinSelection();
				return;
			}
		} else {
			// Check if skin button was clicked
			var skinBounds = {
				left: skinBtn.x - 120,
				right: skinBtn.x + 120,
				top: skinBtn.y - 30,
				bottom: skinBtn.y + 30
			};
			if (x >= skinBounds.left && x <= skinBounds.right && y >= skinBounds.top && y <= skinBounds.bottom) {
				// Check if this is a long press for skin selection or quick tap for start
				var pressStartTime = Date.now();
				var longPressThreshold = 500; // 500ms for long press
				var longPressTimer = LK.setTimeout(function () {
					// Long press - show skin selection
					tween(skinBtn, {
						scaleX: 0.95,
						scaleY: 0.95
					}, {
						duration: 100,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							tween(skinBtn, {
								scaleX: 1.0,
								scaleY: 1.0
							}, {
								duration: 100,
								easing: tween.easeOut
							});
						}
					});
					tween(skinBtnBorder, {
						scaleX: 0.76,
						scaleY: 0.57,
						tint: 0x1B5E20
					}, {
						duration: 100,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							tween(skinBtnBorder, {
								scaleX: 0.84,
								scaleY: 0.63,
								tint: 0x2E7D32
							}, {
								duration: 100,
								easing: tween.easeOut
							});
						}
					});
					tween(skinBtnBg, {
						scaleX: 0.76,
						scaleY: 0.57,
						tint: 0x45A049
					}, {
						duration: 100,
						easing: tween.easeOut,
						onFinish: function onFinish() {
							tween(skinBtnBg, {
								scaleX: 0.8,
								scaleY: 0.6,
								tint: 0x4CAF50
							}, {
								duration: 100,
								easing: tween.easeOut
							});
						}
					});
					showSkinSelection();
				}, longPressThreshold);
				// Store the timer for potential cancellation
				game.longPressTimer = longPressTimer;
				return;
			}
		}
		// Note: Game start logic moved to up handler for shared button functionality
	}
	// Check if game is prepared but not yet active (waiting for touch to start)
	if (gameStarted && !gameActive) {
		// First touch after start button - actually start the game
		gameActive = true;
		// Spawn first pipe with delay
		LK.setTimeout(function () {
			spawnPipe();
		}, 800);
		bird.flap();
		return;
	}
	if (gameActive) {
		bird.flap();
	}
};
// Touch/tap up handler for shared button functionality
game.up = function (x, y, obj) {
	if (!gameStarted && !skinShowMode && game.longPressTimer) {
		// Cancel long press timer
		LK.clearTimeout(game.longPressTimer);
		game.longPressTimer = null;
		// Check if this was a quick tap on the shared button
		var skinBounds = {
			left: skinBtn.x - 120,
			right: skinBtn.x + 120,
			top: skinBtn.y - 30,
			bottom: skinBtn.y + 30
		};
		if (x >= skinBounds.left && x <= skinBounds.right && y >= skinBounds.top && y <= skinBounds.bottom) {
			// Quick tap - prepare game but don't start yet
			gameStarted = true;
			gameActive = false; // Game is prepared but not active yet
			// Hide all starting screen elements with staggered animations
			tween(titleTxt, {
				alpha: 0,
				scaleX: 0.8,
				scaleY: 0.8
			}, {
				duration: 400,
				easing: tween.easeIn,
				onFinish: function onFinish() {
					titleTxt.visible = false;
				}
			});
			tween(subtitleTxt, {
				alpha: 0,
				scaleX: 0.8,
				scaleY: 0.8
			}, {
				duration: 400,
				easing: tween.easeIn,
				onFinish: function onFinish() {
					subtitleTxt.visible = false;
				}
			});
			// Additional entrance animations can be added here if needed
			tween(bestScoreTxt, {
				alpha: 0,
				y: bestScoreTxt.y + 50
			}, {
				duration: 250,
				easing: tween.easeIn,
				onFinish: function onFinish() {
					bestScoreTxt.visible = false;
				}
			});
			// Hide skin button when game starts
			tween(skinBtn, {
				alpha: 0,
				scaleX: 0.8,
				scaleY: 0.8
			}, {
				duration: 300,
				easing: tween.easeIn,
				onFinish: function onFinish() {
					skinBtn.visible = false;
					skinBtn.destroy();
				}
			});
			tween(skinBtnBg, {
				alpha: 0,
				scaleX: 0.64,
				scaleY: 0.48
			}, {
				duration: 300,
				easing: tween.easeIn,
				onFinish: function onFinish() {
					skinBtnBg.visible = false;
					skinBtnBg.destroy();
				}
			});
			tween(skinBtnBorder, {
				alpha: 0,
				scaleX: 0.64,
				scaleY: 0.48
			}, {
				duration: 300,
				easing: tween.easeIn,
				onFinish: function onFinish() {
					skinBtnBorder.visible = false;
					skinBtnBorder.destroy();
				}
			});
			// Hide sparkles when game starts
			for (var i = 0; i < sparkles.length; i++) {
				tween(sparkles[i], {
					alpha: 0,
					scaleX: 0.1,
					scaleY: 0.1
				}, {
					duration: 400,
					easing: tween.easeIn,
					onFinish: function (sparkle) {
						return function () {
							sparkle.visible = false;
						};
					}(sparkles[i])
				});
			}
			// Don't spawn pipes yet - wait for touch to start
			// Bird will start flying when user first touches screen
			// Removed hover mode - bird stays stationary
		}
	}
};
// Main game loop
game.update = function () {
	// Weather change system
	if (gameStarted && gameActive) {
		weatherChangeTimer++;
		if (weatherChangeTimer >= weatherChangeInterval) {
			changeWeather();
			weatherChangeTimer = 0;
		}
	}
	// Always update background elements for ambiance
	for (var i = 0; i < clouds.length; i++) {
		clouds[i].update();
	}
	for (var i = 0; i < monkeys.length; i++) {
		monkeys[i].update();
	}
	if (!gameStarted || !gameActive) {
		return;
	}
	// Update difficulty level
	difficultyLevel = Math.floor(LK.getScore() / 15) + 1;
	// Update combo system
	if (comboTimer > 0) {
		comboTimer--;
	} else {
		comboMultiplier = Math.max(1, comboMultiplier - 0.1);
	}
	// Update bird
	bird.update();
	// Render bird wing trails
	for (var i = 0; i < bird.trail.length; i++) {
		var trailPoint = bird.trail[i];
		if (trailPoint.isWingTrail) {
			var alpha = trailPoint.life / 15;
			var size = alpha * 0.3;
			// Create wing trail particles
			if (i % 2 === 0 && alpha > 0.3) {
				var wingParticle = new Particle();
				wingParticle.x = trailPoint.x + (Math.random() - 0.5) * 20;
				wingParticle.y = trailPoint.y + (Math.random() - 0.5) * 20;
				wingParticle.velocityX = (Math.random() - 0.5) * 2;
				wingParticle.velocityY = (Math.random() - 0.5) * 2;
				wingParticle.life = 20;
				wingParticle.children[0].tint = 0x87CEEB;
				wingParticle.children[0].alpha = alpha * 0.5;
				wingParticle.children[0].scaleX = size;
				wingParticle.children[0].scaleY = size;
				particles.push(wingParticle);
				game.addChild(wingParticle);
			}
		}
		trailPoint.life--;
	}
	// Remove dead trail points
	for (var i = bird.trail.length - 1; i >= 0; i--) {
		if (bird.trail[i].life <= 0) {
			bird.trail.splice(i, 1);
		}
	}
	// Update particles
	for (var i = particles.length - 1; i >= 0; i--) {
		particles[i].update();
		if (particles[i].life <= 0) {
			particles[i].destroy();
			particles.splice(i, 1);
		}
	}
	// Update pipes
	for (var i = pipes.length - 1; i >= 0; i--) {
		pipes[i].update();
		// Remove pipes that have moved off screen
		if (pipes[i].x < -120) {
			pipes[i].destroy();
			pipes.splice(i, 1);
		}
	}
	// Update coins
	for (var i = coins.length - 1; i >= 0; i--) {
		coins[i].update();
		// Remove coins that have moved off screen
		if (coins[i].x < -120) {
			coins[i].destroy();
			coins.splice(i, 1);
		}
	}
	// Update power-ups
	for (var i = powerUps.length - 1; i >= 0; i--) {
		powerUps[i].update();
		if (powerUps[i].x < -120) {
			powerUps[i].destroy();
			powerUps.splice(i, 1);
		}
	}
	// Update spawn points
	for (var i = 0; i < spawnPoints.length; i++) {
		spawnPoints[i].update();
		// Move spawn points left
		spawnPoints[i].x -= 2;
		// Reset spawn point position when it goes off screen
		if (spawnPoints[i].x < -100) {
			spawnPoints[i].x = 2048 + 200;
			spawnPoints[i].y = 300 + Math.random() * 400;
		}
	}
	// Update buildings
	for (var i = buildings.length - 1; i >= 0; i--) {
		buildings[i].update();
		// Remove buildings that have moved off screen
		if (buildings[i].x < -200) {
			buildings[i].destroy();
			buildings.splice(i, 1);
		}
	}
	// Update buildings2
	for (var i = buildings2.length - 1; i >= 0; i--) {
		buildings2[i].update();
		// Remove buildings2 that have moved off screen
		if (buildings2[i].x < -250) {
			buildings2[i].destroy();
			buildings2.splice(i, 1);
		}
	}
	// Spawn new pipes with consistent timing
	pipeSpawnTimer++;
	if (pipeSpawnTimer >= pipeSpawnInterval) {
		spawnPipe();
		pipeSpawnTimer = 0;
	}
	// Spawn new buildings
	buildingSpawnTimer++;
	if (buildingSpawnTimer >= buildingSpawnInterval) {
		spawnBuilding();
		buildingSpawnTimer = 0;
	}
	// Spawn new Building2 instances
	building2SpawnTimer++;
	if (building2SpawnTimer >= building2SpawnInterval) {
		spawnBuilding2();
		building2SpawnTimer = 0;
	}
	// Check for score
	checkScore();
	// Check for coin collection
	checkCoinCollection();
	// Check for power-up collection
	checkPowerUpCollection();
	// Check for collisions (shield protects from damage)
	if (checkCollisions() && !bird.invincible && !bird.shieldActive) {
		takeDamage();
	}
	// Screen shake effect when bird is close to pipes
	for (var i = 0; i < pipes.length; i++) {
		var distance = Math.abs(bird.x - pipes[i].x);
		if (distance < 100) {
			var intensity = (100 - distance) / 100 * 2;
			game.x = (Math.random() - 0.5) * intensity;
			game.y = (Math.random() - 0.5) * intensity;
			break;
		} else {
			game.x = 0;
			game.y = 0;
		}
	}
};