/**** 
* 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.flap = function () {
		self.velocity = self.flapStrength;
		LK.getSound('flap').play();
		// Animate bird flap
		tween(birdGraphics, {
			rotation: -0.3
		}, {
			duration: 150
		});
		tween(birdGraphics, {
			rotation: 0
		}, {
			duration: 150,
			onFinish: function onFinish() {
				if (self.velocity > 0) {
					tween(birdGraphics, {
						rotation: 0.3
					}, {
						duration: 200
					});
				}
			}
		});
	};
	self.update = function () {
		// Don't update bird physics if game hasn't started
		if (!gameStarted) {
			return;
		}
		// Apply gravity
		self.velocity += self.gravity;
		if (self.velocity > self.maxFallSpeed) {
			self.velocity = self.maxFallSpeed;
		}
		// Update position
		self.y += self.velocity;
		// Update rotation based on velocity with falling effect
		var targetRotation = Math.min(Math.max(self.velocity * 0.05, -0.5), 0.8);
		// Add dramatic falling effect when bird is falling fast
		if (self.velocity > 8) {
			// Create falling spin effect
			tween(birdGraphics, {
				rotation: targetRotation + Math.PI * 2
			}, {
				duration: 800,
				easing: tween.easeIn
			});
			// Add slight scale effect during fall
			tween(birdGraphics, {
				scaleX: 0.9,
				scaleY: 1.1
			}, {
				duration: 300,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					tween(birdGraphics, {
						scaleX: 1,
						scaleY: 1
					}, {
						duration: 200
					});
				}
			});
		} else {
			// Normal rotation for regular movement
			birdGraphics.rotation = targetRotation;
		}
	};
	return self;
});
var Chicken = Container.expand(function () {
	var self = Container.call(this);
	var chickenGraphics = self.attachAsset('chicken', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.speed = -4;
	self.baseY = 0;
	self.pecking = false;
	self.update = function () {
		self.x += self.speed;
		// Chicken walking animation - quick and jerky movements
		var walkCycle = LK.ticks * 0.25; // Fast walking
		// Quick head bobbing motion
		self.y = self.baseY + Math.sin(walkCycle) * 1;
		// Head jerking motion characteristic of chickens
		chickenGraphics.x = Math.sin(walkCycle * 0.8) * 0.5;
		// Periodic pecking animation
		if (LK.ticks % 120 === 0) {
			self.pecking = !self.pecking;
		}
		// Quick stepping animation every 10 frames for rapid chicken steps
		if (LK.ticks % 10 === 0) {
			var stepDirection = Math.floor(LK.ticks / 10) % 2 * 2 - 1;
			tween(chickenGraphics, {
				scaleY: 0.95,
				scaleX: 1.05,
				y: stepDirection * 0.3,
				rotation: stepDirection * 0.05
			}, {
				duration: 50,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					tween(chickenGraphics, {
						scaleY: 1,
						scaleX: 1,
						y: 0,
						rotation: 0
					}, {
						duration: 50,
						easing: tween.easeIn
					});
				}
			});
		}
		// Enhanced pecking motion when pecking
		if (self.pecking) {
			chickenGraphics.y = Math.sin(LK.ticks * 0.3) * 2;
		}
	};
	return self;
});
// Cloud class removed
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.rotationSpeed = 0.1;
	self.update = function () {
		self.x += self.speed;
		// Rotate coin for visual appeal
		coinGraphics.rotation += self.rotationSpeed;
		// Gentle floating animation
		coinGraphics.y = Math.sin(LK.ticks * 0.05) * 3;
	};
	return self;
});
var Cow = Container.expand(function () {
	var self = Container.call(this);
	var cowGraphics = self.attachAsset('cow', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.speed = -4;
	// Add some black spots for cow appearance
	self.baseY = 0;
	self.update = function () {
		self.x += self.speed;
		// Proper walking animation with realistic bobbing
		var walkCycle = LK.ticks * 0.15; // Walking speed
		// Vertical bobbing motion - more pronounced and realistic
		self.y = self.baseY + Math.sin(walkCycle) * 2;
		// Subtle horizontal body sway
		cowGraphics.x = Math.sin(walkCycle * 0.5) * 1;
		// Body tilt during walking
		cowGraphics.rotation = Math.sin(walkCycle) * 0.05;
		// Step-based animation every 20 frames for more frequent steps
		if (LK.ticks % 20 === 0) {
			// Alternating leg movement effect
			var stepDirection = Math.floor(LK.ticks / 20) % 2 * 2 - 1; // -1 or 1
			// Step effect with body compression and extension
			tween(cowGraphics, {
				scaleY: 0.95,
				scaleX: 1.05,
				y: stepDirection * 1
			}, {
				duration: 100,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					tween(cowGraphics, {
						scaleY: 1,
						scaleX: 1,
						y: 0
					}, {
						duration: 100,
						easing: tween.easeIn
					});
				}
			});
		}
	};
	return self;
});
var Farm = Container.expand(function () {
	var self = Container.call(this);
	var farmGraphics = self.attachAsset('farmGround', {
		anchorX: 0,
		anchorY: 0
	});
	self.speed = -4;
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});
var Pig = Container.expand(function () {
	var self = Container.call(this);
	var pigGraphics = self.attachAsset('pig', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.speed = -4;
	self.baseY = 0;
	self.update = function () {
		self.x += self.speed;
		// Pig walking animation - heavier and slower
		var walkCycle = LK.ticks * 0.12; // Slower walking
		// Heavy bobbing motion
		self.y = self.baseY + Math.sin(walkCycle) * 1.2;
		// Wide body sway for heavier appearance
		pigGraphics.x = Math.sin(walkCycle * 0.3) * 1.5;
		// Heavy stepping animation every 25 frames
		if (LK.ticks % 25 === 0) {
			var stepDirection = Math.floor(LK.ticks / 25) % 2 * 2 - 1;
			tween(pigGraphics, {
				scaleY: 0.92,
				scaleX: 1.08,
				y: stepDirection * 0.8
			}, {
				duration: 125,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					tween(pigGraphics, {
						scaleY: 1,
						scaleX: 1,
						y: 0
					}, {
						duration: 125,
						easing: tween.easeIn
					});
				}
			});
		}
	};
	return self;
});
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	self.speed = -4;
	self.passed = false;
	self.gapSize = 300;
	// Create top pipe
	self.topPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Create top pipe segment (Mario-style cap)
	self.topPipeSegment = self.attachAsset('pipeSegment', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Create bottom pipe
	self.bottomPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0
	});
	// Create bottom pipe segment (Mario-style cap)
	self.bottomPipeSegment = self.attachAsset('pipeSegment', {
		anchorX: 0.5,
		anchorY: 0
	});
	self.setGapPosition = function (gapY) {
		self.topPipe.y = gapY - self.gapSize / 2;
		self.bottomPipe.y = gapY + self.gapSize / 2;
		// Position the Mario-style pipe segments
		self.topPipeSegment.y = gapY - self.gapSize / 2;
		self.bottomPipeSegment.y = gapY + self.gapSize / 2;
	};
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});
var Sheep = Container.expand(function () {
	var self = Container.call(this);
	var sheepGraphics = self.attachAsset('sheep', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.speed = -4;
	self.baseY = 0;
	self.update = function () {
		self.x += self.speed;
		// Sheep walking animation - lighter and bouncier than cows
		var walkCycle = LK.ticks * 0.18; // Slightly faster walking
		// Bouncy vertical movement
		self.y = self.baseY + Math.sin(walkCycle) * 1.5;
		// Gentle body sway
		sheepGraphics.x = Math.sin(walkCycle * 0.4) * 0.8;
		// Light stepping animation every 15 frames for quicker steps
		if (LK.ticks % 15 === 0) {
			var stepDirection = Math.floor(LK.ticks / 15) % 2 * 2 - 1;
			tween(sheepGraphics, {
				scaleY: 0.98,
				scaleX: 1.02,
				y: stepDirection * 0.5
			}, {
				duration: 75,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					tween(sheepGraphics, {
						scaleY: 1,
						scaleX: 1,
						y: 0
					}, {
						duration: 75,
						easing: tween.easeIn
					});
				}
			});
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x4a90e2
});

/**** 
* Game Code
****/ 
// Game variables
// Cloud asset removed
// Sky gradient assets removed
var bird;
var pipes = [];
var ground;
var gameStarted = false;
var gameSpeed = 4;
var pipeSpawnTimer = 0;
var pipeSpawnInterval = 180; // frames between pipe spawns
var lastPipeScore = 0;
var coins = [];
var coinSpawnTimer = 0;
var coinSpawnInterval = 200; // frames between coin spawns - slightly after pipes
// Cloud spawning removed
var farms = [];
var farmSpawnTimer = 0;
var farmSpawnInterval = 400; // frames between farm spawns
var animals = [];
var animalSpawnTimer = 0;
var animalSpawnInterval = 150; // frames between animal spawns
// Sky gradient layers removed
// Health system variables
var maxHealth = 3;
var currentHealth = 3;
var healthBar;
var healthBarBg;
// UI elements
var scoreTxt = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var instructionTxt = new Text2('Tap to Flap!', {
	size: 60,
	fill: 0xFFFFFF
});
instructionTxt.anchor.set(0.5, 0.5);
LK.gui.center.addChild(instructionTxt);
// Start menu UI elements
var showStartMenu = true;
var titleTxt = new Text2('Flappy Bird', {
	size: 120,
	fill: 0xFFD700
});
titleTxt.anchor.set(0.5, 0.5);
LK.gui.center.addChild(titleTxt);
var startButtonTxt = new Text2('TAP TO START', {
	size: 80,
	fill: 0x00FF00
});
startButtonTxt.anchor.set(0.5, 0.5);
LK.gui.center.addChild(startButtonTxt);
// Position menu elements
titleTxt.y = -200;
startButtonTxt.y = 100;
// Add pulsing animation to start button
tween(startButtonTxt, {
	scaleX: 1.1,
	scaleY: 1.1
}, {
	duration: 800,
	easing: tween.easeInOut,
	onFinish: function onFinish() {
		tween(startButtonTxt, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 800,
			easing: tween.easeInOut
		});
	}
});
// Set interval for continuous button pulsing
var buttonPulseTimer = LK.setInterval(function () {
	if (showStartMenu) {
		tween(startButtonTxt, {
			scaleX: 1.1,
			scaleY: 1.1
		}, {
			duration: 800,
			easing: tween.easeInOut,
			onFinish: function onFinish() {
				tween(startButtonTxt, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 800,
					easing: tween.easeInOut
				});
			}
		});
	}
}, 1600);
// Create health bar
healthBarBg = LK.getAsset('healthBarBg', {
	anchorX: 0,
	anchorY: 0
});
healthBarBg.x = 150;
healthBarBg.y = 20;
LK.gui.topLeft.addChild(healthBarBg);
healthBar = LK.getAsset('healthBarFill', {
	anchorX: 0,
	anchorY: 0
});
healthBar.x = 150;
healthBar.y = 20;
LK.gui.topLeft.addChild(healthBar);
// Create bird
bird = game.addChild(new Bird());
bird.x = 400;
bird.y = 1366; // Center of screen height
// Initialize health system
currentHealth = maxHealth;
updateHealthBar();
// Hide game UI initially
scoreTxt.alpha = 0;
instructionTxt.alpha = 0;
healthBarBg.alpha = 0;
healthBar.alpha = 0;
// Create ground
ground = game.addChild(LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0
}));
ground.x = 0;
ground.y = 2732 - 100; // Bottom of screen
// Game state tracking
var lastBirdY = bird.y;
var lastGroundCollision = false;
var lastCeilingCollision = false;
function spawnPipe() {
	var pipe = new Pipe();
	pipe.x = 2048 + 60; // Start off-screen right
	// Random gap position (avoiding too high or too low)
	var minGapY = 300;
	var maxGapY = ground.y - 300;
	var gapY = minGapY + Math.random() * (maxGapY - minGapY);
	pipe.setGapPosition(gapY);
	pipe.speed = -gameSpeed;
	// Add entrance animation - pipes grow from small to normal size
	pipe.scaleX = 0.3;
	pipe.scaleY = 0.3;
	tween(pipe, {
		scaleX: 1,
		scaleY: 1
	}, {
		duration: 400,
		easing: tween.easeOut
	});
	pipes.push(pipe);
	game.addChild(pipe);
}
function spawnCoin() {
	// Only spawn coin if there's a recent pipe to place it with
	if (pipes.length > 0) {
		var latestPipe = pipes[pipes.length - 1];
		var coin = new Coin();
		// Place coin slightly ahead of the pipe gap
		coin.x = latestPipe.x + 150; // Position coin in the gap area
		// Place coin in the center of the pipe gap
		var gapCenterY = (latestPipe.topPipe.y + latestPipe.bottomPipe.y) / 2;
		coin.y = gapCenterY;
		coin.speed = -gameSpeed;
		// Add sparkle entrance effect - coin appears with bounce
		coin.scaleX = 0;
		coin.scaleY = 0;
		tween(coin, {
			scaleX: 1.2,
			scaleY: 1.2
		}, {
			duration: 200,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(coin, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 150,
					easing: tween.easeIn
				});
			}
		});
		coins.push(coin);
		game.addChild(coin);
	}
}
// Cloud spawning function removed
function spawnFarm() {
	var farm = new Farm();
	farm.x = 2048;
	farm.y = ground.y - 200; // Position above ground
	farm.speed = -gameSpeed;
	farms.push(farm);
	game.addChild(farm);
}
function spawnAnimal() {
	if (farms.length > 0) {
		var randomFarm = farms[Math.floor(Math.random() * farms.length)];
		var animalTypes = [Cow, Sheep, Pig, Chicken];
		var AnimalClass = animalTypes[Math.floor(Math.random() * animalTypes.length)];
		var animal = new AnimalClass();
		animal.x = randomFarm.x + Math.random() * 1500; // Random position on farm
		animal.baseY = randomFarm.y;
		animal.y = animal.baseY;
		animal.speed = -gameSpeed;
		animals.push(animal);
		game.addChild(animal);
	}
}
function updateHealthBar() {
	var healthPercent = currentHealth / maxHealth;
	healthBar.width = 200 * healthPercent;
	// Change color based on health
	if (healthPercent > 0.6) {
		healthBar.tint = 0x00ff00; // Green
	} else if (healthPercent > 0.3) {
		healthBar.tint = 0xffff00; // Yellow
	} else {
		healthBar.tint = 0xff0000; // Red
	}
	// Flash effect when damaged
	tween(healthBar, {
		alpha: 0.5
	}, {
		duration: 100,
		onFinish: function onFinish() {
			tween(healthBar, {
				alpha: 1
			}, {
				duration: 100
			});
		}
	});
}
function takeDamage() {
	currentHealth--;
	updateHealthBar();
	if (currentHealth <= 0) {
		LK.getSound('hit').play();
		// Add dramatic screen shake before game over
		var originalX = game.x;
		var originalY = game.y;
		tween(game, {
			x: originalX + 20,
			y: originalY + 10
		}, {
			duration: 50,
			onFinish: function onFinish() {
				tween(game, {
					x: originalX - 15,
					y: originalY - 8
				}, {
					duration: 50,
					onFinish: function onFinish() {
						tween(game, {
							x: originalX,
							y: originalY
						}, {
							duration: 100,
							onFinish: function onFinish() {
								LK.showGameOver();
							}
						});
					}
				});
			}
		});
		return true; // Game over
	}
	LK.getSound('hit').play();
	// Add screen shake effect for damage feedback
	var originalX = game.x;
	var originalY = game.y;
	tween(game, {
		x: originalX + 10,
		y: originalY + 5
	}, {
		duration: 60,
		onFinish: function onFinish() {
			tween(game, {
				x: originalX - 8,
				y: originalY - 4
			}, {
				duration: 60,
				onFinish: function onFinish() {
					tween(game, {
						x: originalX,
						y: originalY
					}, {
						duration: 80
					});
				}
			});
		}
	});
	// Flash bird red when damaged
	tween(bird, {
		tint: 0xff0000
	}, {
		duration: 200,
		onFinish: function onFinish() {
			tween(bird, {
				tint: 0xffffff
			}, {
				duration: 200
			});
		}
	});
	return false; // Continue game
}
function checkCollisions() {
	// Check ground collision
	var currentGroundCollision = bird.y + 22 >= ground.y; // bird half-height
	if (!lastGroundCollision && currentGroundCollision) {
		LK.getSound('hit').play();
		LK.showGameOver();
		return;
	}
	lastGroundCollision = currentGroundCollision;
	// Check heaven win condition - when bird reaches very top
	var heavenThreshold = -50; // Above the screen
	if (bird.y <= heavenThreshold) {
		// Flash screen with heavenly light effect
		tween(game, {
			tint: 0xffffff
		}, {
			duration: 500,
			onFinish: function onFinish() {
				tween(game, {
					tint: 0xffffff
				}, {
					duration: 500,
					onFinish: function onFinish() {
						LK.showYouWin(); // Show win screen
					}
				});
			}
		});
		return;
	}
	// Check ceiling collision (but not heaven)
	var currentCeilingCollision = bird.y - 22 <= 0 && bird.y > heavenThreshold;
	if (!lastCeilingCollision && currentCeilingCollision) {
		LK.getSound('hit').play();
		LK.showGameOver();
		return;
	}
	lastCeilingCollision = currentCeilingCollision;
	// Check pipe collisions and scoring
	for (var i = pipes.length - 1; i >= 0; i--) {
		var pipe = pipes[i];
		// Check if bird passed through pipe (scoring)
		if (!pipe.passed && bird.x > pipe.x + 60) {
			pipe.passed = true;
			// No score change when passing through pipes
			LK.getSound('score').play();
			// Increase difficulty every 5 pipes
			if (LK.getScore() % 5 === 0) {
				gameSpeed += 0.5;
			}
		}
		// Check collision with pipes
		var birdLeft = bird.x - 30;
		var birdRight = bird.x + 30;
		var birdTop = bird.y - 22;
		var birdBottom = bird.y + 22;
		var pipeLeft = pipe.x - 60;
		var pipeRight = pipe.x + 60;
		if (birdRight > pipeLeft && birdLeft < pipeRight) {
			// Bird is horizontally aligned with pipe
			var topPipeBottom = pipe.topPipe.y;
			var bottomPipeTop = pipe.bottomPipe.y;
			if (birdTop < topPipeBottom || birdBottom > bottomPipeTop) {
				// Check if this pipe already caused damage
				if (!pipe.damageCaused) {
					pipe.damageCaused = true;
					if (takeDamage()) {
						return; // Game over
					}
				}
			}
		}
	}
	// Check coin collection
	for (var j = coins.length - 1; j >= 0; j--) {
		var coin = coins[j];
		if (!coin.collected && bird.intersects(coin)) {
			coin.collected = true;
			LK.setScore(LK.getScore() + 1); // Coins worth 1 point
			scoreTxt.setText(LK.getScore());
			LK.getSound('coin').play();
			// Add score text animation for feedback
			tween(scoreTxt, {
				scaleX: 1.3,
				scaleY: 1.3
			}, {
				duration: 150,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					tween(scoreTxt, {
						scaleX: 1,
						scaleY: 1
					}, {
						duration: 150,
						easing: tween.easeIn
					});
				}
			});
			// Visual effect - make coin disappear with scaling
			tween(coin, {
				scaleX: 0,
				scaleY: 0,
				alpha: 0
			}, {
				duration: 200,
				onFinish: function onFinish() {
					coin.destroy();
				}
			});
			coins.splice(j, 1);
		}
	}
}
// Touch controls
game.down = function (x, y, obj) {
	if (showStartMenu) {
		// Start the game from menu
		showStartMenu = false;
		gameStarted = true;
		// Smooth fade out menu elements
		tween(titleTxt, {
			alpha: 0,
			y: titleTxt.y - 100
		}, {
			duration: 500,
			easing: tween.easeIn
		});
		tween(startButtonTxt, {
			alpha: 0,
			scaleX: 0.8,
			scaleY: 0.8
		}, {
			duration: 300,
			easing: tween.easeIn
		});
		// Smooth fade in game UI
		tween(scoreTxt, {
			alpha: 1
		}, {
			duration: 800,
			easing: tween.easeOut
		});
		tween(instructionTxt, {
			alpha: 1
		}, {
			duration: 1000,
			easing: tween.easeOut
		});
		tween(healthBarBg, {
			alpha: 1
		}, {
			duration: 600,
			easing: tween.easeOut
		});
		tween(healthBar, {
			alpha: 1
		}, {
			duration: 600,
			easing: tween.easeOut
		});
		// Start background music
		try {
			LK.playMusic('bgmusic', {
				loop: true,
				volume: 0.5
			});
		} catch (e) {
			console.log('Music playback failed:', e);
		}
		// Hide instruction after a delay with smooth fade
		tween(instructionTxt, {
			alpha: 0
		}, {
			duration: 2000,
			easing: tween.easeInOut
		});
		bird.flap();
	} else if (!gameStarted) {
		gameStarted = true;
		tween(instructionTxt, {
			alpha: 0
		}, {
			duration: 500,
			easing: tween.easeOut
		});
		bird.flap();
	} else {
		bird.flap();
	}
};
// Main game loop
game.update = function () {
	if (!gameStarted) {
		return;
	}
	// Update bird
	lastBirdY = bird.y;
	// Spawn pipes
	pipeSpawnTimer++;
	if (pipeSpawnTimer >= pipeSpawnInterval) {
		spawnPipe();
		pipeSpawnTimer = 0;
	}
	// Spawn coins - spawn a coin shortly after each pipe
	coinSpawnTimer++;
	if (coinSpawnTimer >= coinSpawnInterval) {
		spawnCoin();
		coinSpawnTimer = 0;
	}
	// Cloud spawning logic removed
	// Spawn farms
	farmSpawnTimer++;
	if (farmSpawnTimer >= farmSpawnInterval) {
		spawnFarm();
		farmSpawnTimer = 0;
	}
	// Spawn animals on existing farms
	animalSpawnTimer++;
	if (animalSpawnTimer >= animalSpawnInterval) {
		spawnAnimal();
		animalSpawnTimer = 0;
	}
	// Update pipes and remove off-screen ones
	for (var i = pipes.length - 1; i >= 0; i--) {
		var pipe = pipes[i];
		pipe.speed = -gameSpeed;
		if (pipe.x < -120) {
			pipe.destroy();
			pipes.splice(i, 1);
		}
	}
	// Update coins and remove off-screen ones
	for (var j = coins.length - 1; j >= 0; j--) {
		var coin = coins[j];
		coin.speed = -gameSpeed;
		if (coin.x < -40) {
			coin.destroy();
			coins.splice(j, 1);
		}
	}
	// Cloud update logic removed
	// Update farms and remove off-screen ones
	for (var l = farms.length - 1; l >= 0; l--) {
		var farm = farms[l];
		farm.speed = -gameSpeed;
		if (farm.x < -2048) {
			farm.destroy();
			farms.splice(l, 1);
		}
	}
	// Update animals and remove off-screen ones
	for (var m = animals.length - 1; m >= 0; m--) {
		var animal = animals[m];
		animal.speed = -gameSpeed;
		if (animal.x < -100) {
			animal.destroy();
			animals.splice(m, 1);
		}
	}
	// Check all collisions
	checkCollisions();
};

===================================================================
--- original.js
+++ change.js
@@ -487,8 +487,18 @@
 	var maxGapY = ground.y - 300;
 	var gapY = minGapY + Math.random() * (maxGapY - minGapY);
 	pipe.setGapPosition(gapY);
 	pipe.speed = -gameSpeed;
+	// Add entrance animation - pipes grow from small to normal size
+	pipe.scaleX = 0.3;
+	pipe.scaleY = 0.3;
+	tween(pipe, {
+		scaleX: 1,
+		scaleY: 1
+	}, {
+		duration: 400,
+		easing: tween.easeOut
+	});
 	pipes.push(pipe);
 	game.addChild(pipe);
 }
 function spawnCoin() {
@@ -501,8 +511,27 @@
 		// Place coin in the center of the pipe gap
 		var gapCenterY = (latestPipe.topPipe.y + latestPipe.bottomPipe.y) / 2;
 		coin.y = gapCenterY;
 		coin.speed = -gameSpeed;
+		// Add sparkle entrance effect - coin appears with bounce
+		coin.scaleX = 0;
+		coin.scaleY = 0;
+		tween(coin, {
+			scaleX: 1.2,
+			scaleY: 1.2
+		}, {
+			duration: 200,
+			easing: tween.easeOut,
+			onFinish: function onFinish() {
+				tween(coin, {
+					scaleX: 1,
+					scaleY: 1
+				}, {
+					duration: 150,
+					easing: tween.easeIn
+				});
+			}
+		});
 		coins.push(coin);
 		game.addChild(coin);
 	}
 }
@@ -558,12 +587,64 @@
 	currentHealth--;
 	updateHealthBar();
 	if (currentHealth <= 0) {
 		LK.getSound('hit').play();
-		LK.showGameOver();
+		// Add dramatic screen shake before game over
+		var originalX = game.x;
+		var originalY = game.y;
+		tween(game, {
+			x: originalX + 20,
+			y: originalY + 10
+		}, {
+			duration: 50,
+			onFinish: function onFinish() {
+				tween(game, {
+					x: originalX - 15,
+					y: originalY - 8
+				}, {
+					duration: 50,
+					onFinish: function onFinish() {
+						tween(game, {
+							x: originalX,
+							y: originalY
+						}, {
+							duration: 100,
+							onFinish: function onFinish() {
+								LK.showGameOver();
+							}
+						});
+					}
+				});
+			}
+		});
 		return true; // Game over
 	}
 	LK.getSound('hit').play();
+	// Add screen shake effect for damage feedback
+	var originalX = game.x;
+	var originalY = game.y;
+	tween(game, {
+		x: originalX + 10,
+		y: originalY + 5
+	}, {
+		duration: 60,
+		onFinish: function onFinish() {
+			tween(game, {
+				x: originalX - 8,
+				y: originalY - 4
+			}, {
+				duration: 60,
+				onFinish: function onFinish() {
+					tween(game, {
+						x: originalX,
+						y: originalY
+					}, {
+						duration: 80
+					});
+				}
+			});
+		}
+	});
 	// Flash bird red when damaged
 	tween(bird, {
 		tint: 0xff0000
 	}, {
@@ -658,8 +739,25 @@
 			coin.collected = true;
 			LK.setScore(LK.getScore() + 1); // Coins worth 1 point
 			scoreTxt.setText(LK.getScore());
 			LK.getSound('coin').play();
+			// Add score text animation for feedback
+			tween(scoreTxt, {
+				scaleX: 1.3,
+				scaleY: 1.3
+			}, {
+				duration: 150,
+				easing: tween.easeOut,
+				onFinish: function onFinish() {
+					tween(scoreTxt, {
+						scaleX: 1,
+						scaleY: 1
+					}, {
+						duration: 150,
+						easing: tween.easeIn
+					});
+				}
+			});
 			// Visual effect - make coin disappear with scaling
 			tween(coin, {
 				scaleX: 0,
 				scaleY: 0,
@@ -679,16 +777,49 @@
 	if (showStartMenu) {
 		// Start the game from menu
 		showStartMenu = false;
 		gameStarted = true;
-		// Hide menu elements
-		titleTxt.alpha = 0;
-		startButtonTxt.alpha = 0;
-		// Show game UI
-		scoreTxt.alpha = 1;
-		instructionTxt.alpha = 1;
-		healthBarBg.alpha = 1;
-		healthBar.alpha = 1;
+		// Smooth fade out menu elements
+		tween(titleTxt, {
+			alpha: 0,
+			y: titleTxt.y - 100
+		}, {
+			duration: 500,
+			easing: tween.easeIn
+		});
+		tween(startButtonTxt, {
+			alpha: 0,
+			scaleX: 0.8,
+			scaleY: 0.8
+		}, {
+			duration: 300,
+			easing: tween.easeIn
+		});
+		// Smooth fade in game UI
+		tween(scoreTxt, {
+			alpha: 1
+		}, {
+			duration: 800,
+			easing: tween.easeOut
+		});
+		tween(instructionTxt, {
+			alpha: 1
+		}, {
+			duration: 1000,
+			easing: tween.easeOut
+		});
+		tween(healthBarBg, {
+			alpha: 1
+		}, {
+			duration: 600,
+			easing: tween.easeOut
+		});
+		tween(healthBar, {
+			alpha: 1
+		}, {
+			duration: 600,
+			easing: tween.easeOut
+		});
 		// Start background music
 		try {
 			LK.playMusic('bgmusic', {
 				loop: true,
@@ -696,18 +827,24 @@
 			});
 		} catch (e) {
 			console.log('Music playback failed:', e);
 		}
-		// Hide instruction after a delay
+		// Hide instruction after a delay with smooth fade
 		tween(instructionTxt, {
 			alpha: 0
 		}, {
-			duration: 2000
+			duration: 2000,
+			easing: tween.easeInOut
 		});
 		bird.flap();
 	} else if (!gameStarted) {
 		gameStarted = true;
-		instructionTxt.alpha = 0;
+		tween(instructionTxt, {
+			alpha: 0
+		}, {
+			duration: 500,
+			easing: tween.easeOut
+		});
 		bird.flap();
 	} else {
 		bird.flap();
 	}