/**** 
* 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 = 0.6;
	self.flapStrength = -10;
	self.maxFallSpeed = 12;
	self.rotation = 0;
	self.animationTimer = 0;
	self.invincible = false;
	self.flap = function () {
		self.velocity = self.flapStrength;
		LK.getSound('flap').play();
		// Wing flapping animation
		tween(birdGraphics, {
			scaleY: 1.2
		}, {
			duration: 100,
			easing: tween.easeOut
		});
		tween(birdGraphics, {
			scaleY: 1.0
		}, {
			duration: 100,
			easing: tween.easeIn
		});
		// Slight upward rotation on flap
		tween(birdGraphics, {
			rotation: -0.4
		}, {
			duration: 150,
			easing: tween.easeOut
		});
	};
	self.update = function () {
		// Apply gravity
		self.velocity += self.gravity;
		// Limit fall speed
		if (self.velocity > self.maxFallSpeed) {
			self.velocity = self.maxFallSpeed;
		}
		// Update position
		self.y += self.velocity;
		// Smooth rotation based on velocity
		var targetRotation = Math.min(self.velocity * 0.08, 1.2);
		if (self.velocity < 0) {
			targetRotation = Math.max(self.velocity * 0.08, -0.4);
		}
		// Smooth rotation transition
		tween.stop(birdGraphics, {
			rotation: true
		});
		tween(birdGraphics, {
			rotation: targetRotation
		}, {
			duration: 200,
			easing: tween.easeOut
		});
		// Subtle bob animation when idle
		if (Math.abs(self.velocity) < 2) {
			self.animationTimer += 0.1;
			var bob = Math.sin(self.animationTimer) * 2;
			birdGraphics.y = bob;
		}
		// Invincibility flashing
		if (self.invincible) {
			birdGraphics.alpha = 0.5 + 0.5 * Math.sin(LK.ticks * 0.3);
		} else {
			birdGraphics.alpha = 1;
		}
	};
	return self;
});
var Building = Container.expand(function () {
	var self = Container.call(this);
	var buildingGraphics = self.attachAsset('building', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.speed = -2;
	self.update = function () {
		self.x += self.speed;
		// Reset position when off screen
		if (self.x < -200) {
			self.x = 2048 + 200;
			self.y = 2732 - 100; // Ground level
		}
	};
	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;
		// Swinging animation
		monkeyGraphics.rotation = Math.sin(self.animationTimer * 1.5) * 0.3;
		// Always face right - no scaling animation
		monkeyGraphics.scaleX = 1;
		monkeyGraphics.scaleY = 1;
		// Reset position when off screen
		if (self.x > 2048 + 100) {
			self.x = -100;
			self.baseY = 200 + Math.random() * 400;
		}
	};
	return self;
});
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	self.gapHeight = 320;
	self.speed = -3;
	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 = 25;
		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 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 buildings = [];
var monkeys = [];
var ground;
var gameStarted = false;
var gameActive = true;
var pipeSpawnTimer = 0;
var pipeSpawnInterval = 180; // 3 seconds at 60fps
var playerHealth = 3;
var bestScore = 0;
var dayTime = true;
var lastColorChangeScore = 0;
var currentSkin = 5;
var skinShowMode = false;
var currentWeather = 0;
var weatherChangeTimer = 0;
var weatherChangeInterval = 1800; // 30 seconds at 60fps
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',
	color: 0xFFFFFF
}, {
	name: 'Red Fire',
	asset: 'bird_red',
	color: 0xFF4444
}, {
	name: 'Blue Ice',
	asset: 'bird_blue',
	color: 0x4488FF
}, {
	name: 'Green Forest',
	asset: 'bird_green',
	color: 0x44FF44
}, {
	name: 'Golden King',
	asset: 'bird_golden',
	color: 0xFFD700
}, {
	name: 'My Crafted',
	asset: 'bird',
	color: 0xFF00FF
}];
// 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 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
var subtitleTxt = new Text2('Guide the bird through pipes!', {
	size: 50,
	fill: 0xFFFFFF
});
subtitleTxt.anchor.set(0.5, 0.5);
subtitleTxt.x = 2048 / 2;
subtitleTxt.y = 2732 / 2 - 300;
subtitleTxt.alpha = 0;
game.addChild(subtitleTxt);
// Create start instruction
var startTxt = new Text2('TAP TO START', {
	size: 60,
	fill: 0xFFFFFF
});
startTxt.anchor.set(0.5, 0.5);
startTxt.x = 2048 / 2;
startTxt.y = 2732 / 2 - 200;
startTxt.alpha = 0;
game.addChild(startTxt);
// 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 clothes button
var clothesBtn = new Text2('SKINS', {
	size: 80,
	fill: 0x00FF00
});
clothesBtn.anchor.set(0.5, 0.5);
clothesBtn.x = 2048 / 2;
clothesBtn.y = 2732 / 2 + 50;
clothesBtn.alpha = 0;
game.addChild(clothesBtn);
// 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 () {
	tween(subtitleTxt, {
		alpha: 1
	}, {
		duration: 800,
		easing: tween.easeOut
	});
}, 300);
LK.setTimeout(function () {
	tween(startTxt, {
		alpha: 1
	}, {
		duration: 1000,
		easing: tween.easeInOut
	});
}, 600);
LK.setTimeout(function () {
	tween(bestScoreTxt, {
		alpha: 1
	}, {
		duration: 800,
		easing: tween.easeOut
	});
}, 900);
LK.setTimeout(function () {
	tween(clothesBtn, {
		alpha: 1,
		scaleX: 1.1,
		scaleY: 1.1
	}, {
		duration: 600,
		easing: tween.bounceOut
	});
}, 1200);
// Pulsing animation for start text
function pulseStartText() {
	tween(startTxt, {
		scaleX: 1.2,
		scaleY: 1.2
	}, {
		duration: 800,
		easing: tween.easeInOut,
		onFinish: function onFinish() {
			tween(startTxt, {
				scaleX: 1.0,
				scaleY: 1.0
			}, {
				duration: 800,
				easing: tween.easeInOut,
				onFinish: pulseStartText
			});
		}
	});
}
pulseStartText();
// Add floating animation for title
function floatTitle() {
	tween(titleTxt, {
		y: titleTxt.y - 20
	}, {
		duration: 2000,
		easing: tween.easeInOut,
		onFinish: function onFinish() {
			tween(titleTxt, {
				y: titleTxt.y + 20
			}, {
				duration: 2000,
				easing: tween.easeInOut,
				onFinish: floatTitle
			});
		}
	});
}
LK.setTimeout(floatTitle, 1500);
// 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
});
initialBirdGraphics.tint = skins[currentSkin].color;
// Smooth entrance animation
tween(bird, {
	x: 2048 / 4
}, {
	duration: 1000,
	easing: tween.easeOut
});
// 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 buildings
for (var i = 0; i < 6; i++) {
	var building = new Building();
	building.x = i * 350 + 100;
	building.y = 2732 - 100;
	var randomHeight = 200 + Math.random() * 400;
	building.scaleY = randomHeight / 300;
	buildings.push(building);
	game.addChild(building);
}
// 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);
}
// 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 + 200; // Start further right
	pipe.alpha = 0; // Start invisible
	// Fixed gap center position - all pipes at same Y coordinate
	var gapCenterY = 2732 / 2; // Center of screen vertically
	pipe.setupPipes(gapCenterY);
	pipes.push(pipe);
	game.addChild(pipe);
	// Smooth pipe entrance animation
	tween(pipe, {
		x: 2048 + 60,
		alpha: 1
	}, {
		duration: 500,
		easing: tween.easeOut
	});
	// Spawn coin in the gap center
	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
			});
		}
	});
}
function checkScore() {
	for (var i = 0; i < pipes.length; i++) {
		var pipe = pipes[i];
		if (!pipe.scored && pipe.x < bird.x) {
			pipe.scored = true;
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore().toString());
			LK.getSound('score').play();
			// 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 checkCoinCollection() {
	for (var i = coins.length - 1; i >= 0; i--) {
		var coin = coins[i];
		if (!coin.collected && coin.checkCollection(bird)) {
			coin.collected = true;
			LK.setScore(LK.getScore() + 5); // Coins worth 5 points
			scoreTxt.setText(LK.getScore().toString());
			LK.getSound('score').play();
			coin.destroy();
			coins.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 > 1) {
		playerHealth--;
		updateHealthDisplay();
		LK.getSound('hit').play();
		// Flash screen red briefly
		LK.effects.flashScreen(0xff0000, 500);
		// Reset bird position and velocity
		bird.y = 2732 / 2;
		bird.velocity = 0;
		// Health display shake animation
		tween(healthTxt, {
			x: healthTxt.x + 20
		}, {
			duration: 50,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(healthTxt, {
					x: healthTxt.x - 40
				}, {
					duration: 100,
					easing: tween.easeInOut,
					onFinish: function onFinish() {
						tween(healthTxt, {
							x: healthTxt.x + 20
						}, {
							duration: 50,
							easing: tween.easeOut
						});
					}
				});
			}
		});
		// Brief invincibility period
		bird.invincible = true;
		LK.setTimeout(function () {
			bird.invincible = false;
		}, 1000);
	} else {
		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;
	startTxt.visible = false;
	bestScoreTxt.visible = false;
	clothesBtn.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;
		}
	});
	tween(nextBtn, {
		alpha: 0
	}, {
		duration: 300,
		easing: tween.easeIn,
		onFinish: function onFinish() {
			nextBtn.visible = false;
		}
	});
	tween(backBtn, {
		alpha: 0
	}, {
		duration: 300,
		easing: tween.easeIn,
		onFinish: function onFinish() {
			backBtn.visible = false;
		}
	});
	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;
		startTxt.visible = true;
		bestScoreTxt.visible = true;
		clothesBtn.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(startTxt, {
			alpha: 1
		}, {
			duration: 500,
			easing: tween.easeOut
		});
		tween(bestScoreTxt, {
			alpha: 1
		}, {
			duration: 500,
			easing: tween.easeOut
		});
		tween(clothesBtn, {
			alpha: 1
		}, {
			duration: 500,
			easing: tween.easeOut
		});
	}, 300);
}
function updateSkinPreview() {
	var skin = skins[currentSkin];
	skinNameTxt.setText(skin.name);
	skinNameTxt.fill = skin.color;
	// Update preview bird skin
	skinPreviewBird.removeChildren();
	var newBirdGraphics = skinPreviewBird.attachAsset(skin.asset, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	newBirdGraphics.tint = skin.color;
	// Add floating animation to preview bird
	tween(skinPreviewBird, {
		y: skinPreviewBird.y - 10
	}, {
		duration: 1000,
		easing: tween.easeInOut,
		onFinish: function onFinish() {
			tween(skinPreviewBird, {
				y: skinPreviewBird.y + 10
			}, {
				duration: 1000,
				easing: tween.easeInOut,
				onFinish: updateSkinPreview
			});
		}
	});
}
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
	});
	newBirdGraphics.tint = skins[currentSkin].color;
}
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) {
		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);
				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);
				return;
			} else if (x >= backBounds.left && x <= backBounds.right && y >= backBounds.top && y <= backBounds.bottom) {
				// Back button - start game directly
				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 start game
				hideSkinSelection();
				// Start the game immediately
				gameStarted = true;
				gameActive = true;
				// 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,
					y: subtitleTxt.y - 50
				}, {
					duration: 350,
					easing: tween.easeIn,
					onFinish: function onFinish() {
						subtitleTxt.visible = false;
					}
				});
				// Smooth fade out start text
				tween(startTxt, {
					alpha: 0,
					scaleX: 0.8,
					scaleY: 0.8
				}, {
					duration: 300,
					easing: tween.easeIn,
					onFinish: function onFinish() {
						startTxt.visible = false;
					}
				});
				tween(bestScoreTxt, {
					alpha: 0,
					y: bestScoreTxt.y + 50
				}, {
					duration: 250,
					easing: tween.easeIn,
					onFinish: function onFinish() {
						bestScoreTxt.visible = false;
					}
				});
				// Hide clothes button when game starts
				tween(clothesBtn, {
					alpha: 0,
					scaleX: 0.8,
					scaleY: 0.8
				}, {
					duration: 300,
					easing: tween.easeIn,
					onFinish: function onFinish() {
						clothesBtn.visible = false;
					}
				});
				// 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])
					});
				}
				// Spawn first pipe with delay
				LK.setTimeout(function () {
					spawnPipe();
				}, 800);
				return;
			}
		} else {
			// Check if skins button was clicked
			var clothesBounds = {
				left: clothesBtn.x - 100,
				right: clothesBtn.x + 100,
				top: clothesBtn.y - 30,
				bottom: clothesBtn.y + 30
			};
			if (x >= clothesBounds.left && x <= clothesBounds.right && y >= clothesBounds.top && y <= clothesBounds.bottom) {
				// Skins button clicked - add button press animation
				tween(clothesBtn, {
					scaleX: 0.9,
					scaleY: 0.9
				}, {
					duration: 100,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						tween(clothesBtn, {
							scaleX: 1.1,
							scaleY: 1.1
						}, {
							duration: 100,
							easing: tween.easeOut
						});
					}
				});
				showSkinSelection();
				return; // Don't start game
			}
		}
		gameStarted = true;
		gameActive = true;
		// 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,
			y: subtitleTxt.y - 50
		}, {
			duration: 350,
			easing: tween.easeIn,
			onFinish: function onFinish() {
				subtitleTxt.visible = false;
			}
		});
		// Smooth fade out start text
		tween(startTxt, {
			alpha: 0,
			scaleX: 0.8,
			scaleY: 0.8
		}, {
			duration: 300,
			easing: tween.easeIn,
			onFinish: function onFinish() {
				startTxt.visible = false;
			}
		});
		tween(bestScoreTxt, {
			alpha: 0,
			y: bestScoreTxt.y + 50
		}, {
			duration: 250,
			easing: tween.easeIn,
			onFinish: function onFinish() {
				bestScoreTxt.visible = false;
			}
		});
		// Hide clothes button when game starts
		tween(clothesBtn, {
			alpha: 0,
			scaleX: 0.8,
			scaleY: 0.8
		}, {
			duration: 300,
			easing: tween.easeIn,
			onFinish: function onFinish() {
				clothesBtn.visible = false;
			}
		});
		// 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])
			});
		}
		// Spawn first pipe with delay
		LK.setTimeout(function () {
			spawnPipe();
		}, 800);
		// Bird will start flying when user first touches screen
	}
	if (gameActive) {
		bird.flap();
	}
};
// 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 < buildings.length; i++) {
		buildings[i].update();
	}
	for (var i = 0; i < monkeys.length; i++) {
		monkeys[i].update();
	}
	if (!gameStarted || !gameActive) {
		return;
	}
	// Update bird
	bird.update();
	// 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 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;
		}
	}
	// Spawn new pipes with dynamic difficulty
	pipeSpawnTimer++;
	var adjustedInterval = Math.max(60, pipeSpawnInterval - Math.floor(LK.getScore() / 10) * 5);
	if (pipeSpawnTimer >= adjustedInterval) {
		spawnPipe();
		pipeSpawnTimer = 0;
	}
	// Check for score
	checkScore();
	// Check for coin collection
	checkCoinCollection();
	// Check for collisions
	if (checkCollisions() && !bird.invincible) {
		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 * 3;
			game.x = (Math.random() - 0.5) * intensity;
			game.y = (Math.random() - 0.5) * intensity;
			break;
		} else {
			game.x = 0;
			game.y = 0;
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -299,8 +299,37 @@
 var dayTime = true;
 var lastColorChangeScore = 0;
 var currentSkin = 5;
 var skinShowMode = false;
+var currentWeather = 0;
+var weatherChangeTimer = 0;
+var weatherChangeInterval = 1800; // 30 seconds at 60fps
+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',
 	color: 0xFFFFFF
@@ -340,8 +369,17 @@
 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 game title
 var titleTxt = new Text2('FLAPPY BIRD', {
 	size: 120,
 	fill: 0xFFD700
@@ -1023,8 +1061,57 @@
 		anchorY: 0.5
 	});
 	newBirdGraphics.tint = skins[currentSkin].color;
 }
+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) {
 		if (skinShowMode) {
@@ -1303,39 +1390,15 @@
 	}
 };
 // Main game loop
 game.update = function () {
-	// Dynamic background color based on score
-	var score = LK.getScore();
-	if (score > 0 && score % 10 === 0 && score !== lastColorChangeScore) {
-		var transitionColor = function transitionColor() {
-			if (stepCount < steps) {
-				var t = stepCount / steps;
-				// Simple linear interpolation between colors
-				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++;
-			}
-		};
-		lastColorChangeScore = score;
-		var colors = [0x87CEEB, 0xFF6B35, 0x4ECDC4, 0x45B7D1, 0x96CEB4, 0xFFA726];
-		var newColor = colors[Math.floor(score / 10) % colors.length];
-		// Smooth background color transition
-		var currentColor = game.backgroundColor;
-		var steps = 60; // 1 second transition
-		var stepCount = 0;
-		var colorTransitionInterval = LK.setInterval(transitionColor, 16);
-		LK.setTimeout(function () {
-			LK.clearInterval(colorTransitionInterval);
-		}, 1000);
+	// 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();