/**** 
* 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 Pipe = Container.expand(function () {
	var self = Container.call(this);
	self.gapHeight = 220;
	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 ground;
var gameStarted = false;
var gameActive = true;
var pipeSpawnTimer = 0;
var pipeSpawnInterval = 120; // 2 seconds at 60fps
var playerHealth = 3;
var bestScore = 0;
var dayTime = true;
var lastColorChangeScore = 0;
// 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 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);
// Fade in start text
tween(startTxt, {
	alpha: 1
}, {
	duration: 1500,
	easing: tween.easeInOut
});
// 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();
// Initialize bird
bird = new Bird();
bird.x = -100; // Start off screen
bird.y = 2732 / 2;
bird.invincible = false;
game.addChild(bird);
// 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 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
	// Random gap center position
	var minGapCenter = 200;
	var maxGapCenter = 2732 - 200 - 100; // Account for ground
	var gapCenterY = minGapCenter + Math.random() * (maxGapCenter - minGapCenter);
	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);
}
// Touch/tap handler
game.down = function (x, y, obj) {
	if (!gameStarted) {
		gameStarted = true;
		gameActive = true;
		// 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;
			}
		});
		// Spawn first pipe with delay
		LK.setTimeout(function () {
			spawnPipe();
		}, 800);
	}
	if (gameActive) {
		bird.flap();
	}
};
// 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);
	}
	// 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();
	}
	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
@@ -260,9 +260,9 @@
 var ground;
 var gameStarted = false;
 var gameActive = true;
 var pipeSpawnTimer = 0;
-var pipeSpawnInterval = 90; // 1.5 seconds at 60fps
+var pipeSpawnInterval = 120; // 2 seconds at 60fps
 var playerHealth = 3;
 var bestScore = 0;
 var dayTime = true;
 var lastColorChangeScore = 0;