/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1", {
	currentLevel: 1,
	unlockedLevels: 1,
	totalScore: 0
});

/**** 
* Classes
****/ 
var BackgroundShape = Container.expand(function () {
	var self = Container.call(this);
	var shapeTypes = ['bgCircle', 'bgSquare', 'bgTriangle'];
	var randomType = shapeTypes[Math.floor(Math.random() * shapeTypes.length)];
	var shapeGraphics = self.attachAsset(randomType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -1 - Math.random() * 2; // Random speed between -1 and -3
	self.rotationSpeed = (Math.random() - 0.5) * 0.02; // Random rotation
	self.pulseScale = 1;
	self.pulseDirection = 1;
	self.alpha = 0.3 + Math.random() * 0.4; // Random transparency between 0.3-0.7
	shapeGraphics.alpha = self.alpha;
	self.update = function () {
		self.x += self.speed;
		// Add rotation
		shapeGraphics.rotation += self.rotationSpeed;
		// Add subtle pulsing
		self.pulseScale += 0.003 * self.pulseDirection;
		if (self.pulseScale > 1.1) self.pulseDirection = -1;
		if (self.pulseScale < 0.9) self.pulseDirection = 1;
		shapeGraphics.scaleX = self.pulseScale;
		shapeGraphics.scaleY = self.pulseScale;
	};
	return self;
});
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Ensure bird is visible
	birdGraphics.alpha = 1.0;
	birdGraphics.visible = true;
	self.velocityY = 0;
	self.gravity = 0.8;
	self.flapPower = -12;
	self.rotation = 0;
	self.rotationVelocity = 0;
	self.isFlipping = false;
	self.completedFlips = 0;
	self.lastUpright = true;
	self.flap = function () {
		self.velocityY = self.flapPower;
		LK.getSound('flap').play();
	};
	self.update = function () {
		// Apply gravity
		self.velocityY += self.gravity;
		self.y += self.velocityY;
		// Add continuous rotation to bird character
		birdGraphics.rotation += 0.1;
		// Keep bird in bounds horizontally
		if (self.x < 40) self.x = 40;
		if (self.x > 2008) self.x = 2008;
	};
	self.isUpright = function () {
		var normalizedRotation = self.rotation % (Math.PI * 2);
		return normalizedRotation < 0.3 || normalizedRotation > Math.PI * 2 - 0.3;
	};
	return self;
});
var Heart = Container.expand(function () {
	var self = Container.call(this);
	var heartGraphics = self.attachAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2,
		scaleY: 2
	});
	self.speed = -3;
	self.collected = false;
	self.pulseScale = 1;
	self.pulseDirection = 1;
	self.floatOffset = 0;
	// Add pulsing and floating animation
	self.update = function () {
		self.x += self.speed;
		// Pulsing effect
		self.pulseScale += 0.01 * self.pulseDirection;
		if (self.pulseScale > 1.2) self.pulseDirection = -1;
		if (self.pulseScale < 0.8) self.pulseDirection = 1;
		heartGraphics.scaleX = self.pulseScale;
		heartGraphics.scaleY = self.pulseScale;
		// Floating effect
		self.floatOffset += 0.05;
		heartGraphics.y = Math.sin(self.floatOffset) * 10;
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	// Choose obstacle type from level-specific sequence
	var randomType = 'block'; // Default fallback
	if (levelObstacleTypes.length > 0) {
		var typeIndex = obstacleCounter % levelObstacleTypes.length;
		randomType = levelObstacleTypes[typeIndex];
	}
	var obstacleGraphics = self.attachAsset(randomType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -3;
	self.passed = false;
	self.obstacleType = randomType;
	// Add visual effects for Geometry Dash style
	self.pulseScale = 1;
	self.pulseDirection = 1;
	self.rotationSpeed = 0;
	self.isStationary = false;
	// Set rotation speed for certain types
	if (randomType === 'spike' || randomType === 'block') {
		self.rotationSpeed = 0.02;
	}
	// Set rest platform specific properties
	if (randomType === 'restPlatform') {
		self.speed = 0; // Rest platforms don't move horizontally
		self.isStationary = true;
		self.isSafe = true; // Mark as safe platform
	}
	// Set door specific properties
	if (randomType === 'door') {
		self.speed = -1; // Doors move slower
		self.isDoor = true; // Mark as door for special collision handling
		self.pulseScale = 1.1; // Start with larger pulse for visibility
	}
	self.update = function () {
		// Only move if not stationary
		if (!self.isStationary) {
			self.x += self.speed;
		}
		// Add pulsing effect only for non-rest platform obstacles
		if (self.obstacleType !== 'restPlatform') {
			self.pulseScale += 0.005 * self.pulseDirection;
			if (self.pulseScale > 1.05) self.pulseDirection = -1;
			if (self.pulseScale < 0.98) self.pulseDirection = 1;
			obstacleGraphics.scaleX = self.pulseScale;
			obstacleGraphics.scaleY = self.pulseScale;
		}
		// Add rotation for certain obstacles
		if (self.rotationSpeed > 0) {
			obstacleGraphics.rotation += self.rotationSpeed;
		}
	};
	return self;
});
var Portal = Container.expand(function () {
	var self = Container.call(this);
	var portalGraphics = self.attachAsset('door', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5
	});
	self.speed = -2;
	self.passed = false;
	self.isPortal = true;
	self.pulseScale = 1;
	self.pulseDirection = 1;
	self.rotationSpeed = 0.01;
	// Portal specific visual effects
	portalGraphics.tint = 0x9966ff; // Purple tint for portal
	self.update = function () {
		self.x += self.speed;
		// Enhanced pulsing effect for portal
		self.pulseScale += 0.008 * self.pulseDirection;
		if (self.pulseScale > 1.3) self.pulseDirection = -1;
		if (self.pulseScale < 0.8) self.pulseDirection = 1;
		portalGraphics.scaleX = self.pulseScale * 1.5;
		portalGraphics.scaleY = self.pulseScale * 1.5;
		// Portal rotation
		portalGraphics.rotation += self.rotationSpeed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var bird;
var obstacles = [];
var hearts = [];
var backgroundShapes = [];
var portals = [];
var ground;
var gameStarted = false;
var lastObstacle = 0;
var obstacleSpacing = 400;
var currentLevel = 1;
var unlockedLevels = 1;
var totalScore = 0;
var levelScoreThreshold = 10; // Score needed to unlock next level
var obstacleCounter = 0; // Counter for obstacle generation
var levelObstacleTypes = []; // Array to store shuffled obstacle types for current level
var playerHealth = 3; // Player starts with 3 lives
var lastBackgroundShape = 0;
var backgroundShapeSpacing = 800; // Spacing between background shapes
var missedHearts = 0; // Track how many hearts were missed
var portalSpawned = false; // Track if portal has been spawned for current level
// Reset game score
LK.setScore(0);
// Create score display
var scoreTxt = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 100;
// Reset storage values to initial state
storage.currentLevel = 1;
storage.unlockedLevels = 1;
storage.totalScore = 0;
// Create level display
var levelTxt = new Text2('Level ' + currentLevel, {
	size: 70,
	fill: 0xFFD700
});
levelTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(levelTxt);
levelTxt.y = 180;
// Create level progress display
var progressTxt = new Text2('Progress: 0/' + levelScoreThreshold, {
	size: 40,
	fill: 0xFFFFFF
});
progressTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(progressTxt);
progressTxt.y = 280;
// Create health display
var healthTxt = new Text2('Lives: ' + playerHealth, {
	size: 50,
	fill: 0xff0000
});
healthTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(healthTxt);
healthTxt.y = 340;
// Create instructions
var instructionTxt = new Text2('TAP TO FLIP AND FLY\nBOUNCE OFF OBSTACLES!', {
	size: 60,
	fill: 0xFFFFFF
});
instructionTxt.anchor.set(0.5, 0.5);
game.addChild(instructionTxt);
instructionTxt.x = 1024;
instructionTxt.y = 1000;
// Create ground
ground = game.addChild(LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0
}));
ground.x = 0;
ground.y = 2632;
// Create bird
bird = game.addChild(new Bird());
bird.x = 300;
bird.y = 800;
// Generate initial obstacle sequence for current level
generateLevelObstacleSequence();
// Create initial obstacles at game start
createObstacle();
// Create initial background shapes
for (var i = 0; i < 5; i++) {
	createBackgroundShape();
}
function generateLevelObstacleSequence() {
	levelObstacleTypes = [];
	var baseTypes = ['spike', 'block', 'tallBlock', 'platform', 'restPlatform', 'restPlatform', 'restPlatform', 'door']; // Added door obstacle type
	var sequenceLength = 50; // Generate enough types for a full level
	var seed = currentLevel * 12345 + Date.now(); // Level-based seed plus current time for different patterns each time
	for (var i = 0; i < sequenceLength; i++) {
		seed = (seed * 9301 + 49297) % 233280;
		var randomIndex = Math.floor(seed / 233280 * baseTypes.length);
		levelObstacleTypes.push(baseTypes[randomIndex]);
	}
}
function updateLevelProgress() {
	var levelProgress = LK.getScore();
	var progressNeeded = levelScoreThreshold * currentLevel;
	// Update progress display
	progressTxt.setText('Progress: ' + levelProgress + '/' + progressNeeded);
}
function updateDifficultyForLevel() {
	// Each level increases difficulty
	var difficultyMultiplier = 1 + (currentLevel - 1) * 0.3;
	// Adjust obstacle spacing based on level
	obstacleSpacing = Math.max(200, 400 - (currentLevel - 1) * 20);
	// Adjust bird physics slightly for higher levels
	if (currentLevel > 3) {
		bird.gravity = 0.8 + (currentLevel - 3) * 0.1;
	}
}
function resetToLevelStart() {
	// Reset to level 1 when game over occurs
	currentLevel = 1;
	storage.currentLevel = 1;
	levelTxt.setText('Level ' + currentLevel);
	// Reset score to level start
	LK.setScore(0);
	scoreTxt.setText(0);
	// Reset health
	playerHealth = 3;
	healthTxt.setText('Lives: ' + playerHealth);
	// Clear all obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		obstacles[i].destroy();
		obstacles.splice(i, 1);
	}
	// Clear all background shapes
	for (var j = backgroundShapes.length - 1; j >= 0; j--) {
		backgroundShapes[j].destroy();
		backgroundShapes.splice(j, 1);
	}
	// Clear all hearts
	for (var k = hearts.length - 1; k >= 0; k--) {
		hearts[k].destroy();
		hearts.splice(k, 1);
	}
	// Clear all portals
	for (var p = portals.length - 1; p >= 0; p--) {
		portals[p].destroy();
		portals.splice(p, 1);
	}
	// Reset obstacle counter
	obstacleCounter = 0;
	// Reset missed hearts counter
	missedHearts = 0;
	// Reset portal spawned flag
	portalSpawned = false;
	// Reset bird position
	bird.x = 300;
	bird.y = 800;
	bird.velocityY = 0;
	bird.completedFlips = 0;
	// Regenerate obstacle sequence for current level
	generateLevelObstacleSequence();
	// Update displays
	updateLevelProgress();
	// Update difficulty for level 1
	updateDifficultyForLevel();
	// Create initial obstacle
	createObstacle();
}
function takeDamage() {
	playerHealth--;
	healthTxt.setText('Lives: ' + playerHealth);
	// Flash screen red when taking damage
	tween(game, {
		tint: 0xff4444
	}, {
		duration: 200,
		onFinish: function onFinish() {
			tween(game, {
				tint: 0xffffff
			}, {
				duration: 200
			});
		}
	});
	// Check if game over
	if (playerHealth <= 0) {
		// Show game over screen with level button
		showGameOverWithLevelButton();
	}
}
function resetHealth() {
	playerHealth = 3;
	healthTxt.setText('Lives: ' + playerHealth);
}
function startGame() {
	if (!gameStarted) {
		gameStarted = true;
		game.removeChild(instructionTxt);
		// Reset obstacle counter for consistent level maps
		obstacleCounter = 0;
		// Generate obstacle sequence for current level
		generateLevelObstacleSequence();
		resetHealth(); // Reset health when starting game
		updateDifficultyForLevel();
		updateLevelProgress();
	}
}
function createBackgroundShape() {
	var bgShape = new BackgroundShape();
	bgShape.x = 2200 + Math.random() * 200; // Start off-screen right
	bgShape.y = 200 + Math.random() * 2300; // Random Y position
	backgroundShapes.push(bgShape);
	game.addChild(bgShape);
}
function createHeart() {
	var heart = new Heart();
	heart.x = 2200; // Start off-screen right
	heart.y = 300 + Math.random() * 2000; // Random Y position within playable area
	hearts.push(heart);
	game.addChild(heart);
}
function createObstacle() {
	// Create walls that cover full screen with a gap for the bird
	var baseX = 2148;
	var gapSize = 600; // Size of the gap for bird to pass through - significantly increased for much easier passage
	// Make level 1 much easier with larger gaps
	if (currentLevel === 1) {
		gapSize = 600; // Reset to original gap size for level 1
	} else if (currentLevel >= 4) {
		// Use a progressive gap size that stays large but gets slightly smaller with more obstacles
		var progressiveGapSize = Math.max(500, 600 - obstacleCounter * 2); // Start at 600, reduce by 2 per obstacle, minimum 500
		gapSize = progressiveGapSize;
	}
	// Use seeded random based on current level, obstacle counter and current time for different maps each time
	var seed = (currentLevel * 1000 + obstacleCounter + Date.now()) % 9973; // Use prime number for better distribution plus time
	var seededRandom = (seed * 9301 + 49297) % 233280 / 233280; // Linear congruential generator
	var gapPosition = seededRandom * (2200 - gapSize) + 300; // Seeded gap position between 300-2200
	var obstacleHeight = 320; // Height of each obstacle segment (reduced from 400)
	// Reduce obstacle height for Level 4 to create more segments and fill gaps
	if (currentLevel >= 4) {
		obstacleHeight = 240; // Smaller segments create more obstacles (reduced from 300)
	}
	var numSegments = Math.ceil(2732 / obstacleHeight); // Number of segments to cover full height
	for (var i = 0; i < numSegments; i++) {
		var segmentY = i * obstacleHeight + obstacleHeight / 2;
		// Skip creating obstacles in the gap area
		if (segmentY + obstacleHeight / 2 > gapPosition && segmentY - obstacleHeight / 2 < gapPosition + gapSize) {
			continue;
		}
		var obstacle = new Obstacle();
		obstacle.x = baseX;
		obstacle.y = segmentY;
		obstacles.push(obstacle);
		game.addChild(obstacle);
	}
	// Add extra obstacles to fill empty spaces for all levels (not just level 4+)
	var extraObstacles = 6 + Math.floor(seededRandom * 4); // 6-9 additional obstacles (increased from 4-6)
	for (var j = 0; j < extraObstacles; j++) {
		var extraSeed = (seed + j * 777) % 9973;
		var extraRandom = (extraSeed * 9301 + 49297) % 233280 / 233280;
		var obstacleX = baseX + 150 + extraRandom * 600; // Spread across wider area
		var obstacleY = 200 + extraRandom * 2200; // Cover more vertical space
		// Make sure it's not in the main gap area
		if (obstacleY < gapPosition - 50 || obstacleY > gapPosition + gapSize + 50) {
			var extraObstacle = new Obstacle();
			extraObstacle.x = obstacleX;
			extraObstacle.y = obstacleY;
			obstacles.push(extraObstacle);
			game.addChild(extraObstacle);
		}
	}
	// Add obstacles in the middle area between main wall and character starting position
	var middleObstacles = 5 + Math.floor(seededRandom * 3); // 5-7 middle obstacles (increased from 3-4)
	for (var m = 0; m < middleObstacles; m++) {
		var middleSeed = (seed + m * 333 + 111) % 9973;
		var middleRandom = (middleSeed * 9301 + 49297) % 233280 / 233280;
		var middleX = baseX - 400 - middleRandom * 800; // Place between character and main wall
		var middleY = 300 + middleRandom * 2000; // Random Y position
		// Ensure obstacles are within screen bounds and spread out
		if (middleX > 500 && middleY > 200 && middleY < 2400) {
			var middleObstacle = new Obstacle();
			middleObstacle.x = middleX;
			middleObstacle.y = middleY;
			obstacles.push(middleObstacle);
			game.addChild(middleObstacle);
		}
	}
	// Add additional scattered obstacles for Level 4, but fewer at the beginning
	if (currentLevel >= 4 && obstacleCounter > 3) {
		// Create 2-3 additional obstacles in random positions, but only after first few obstacles
		var additionalObstacles = 2 + Math.floor(seededRandom * 2); // 2-3 obstacles
		for (var j = 0; j < additionalObstacles; j++) {
			var additionalSeed = (seed + j * 1000) % 9973;
			var additionalRandom = (additionalSeed * 9301 + 49297) % 233280 / 233280;
			var obstacleX = baseX + 200 + additionalRandom * 400; // Spread them out
			var obstacleY = 400 + additionalRandom * 1800; // Random Y position
			// Make sure it's not in the main gap area
			if (obstacleY < gapPosition || obstacleY > gapPosition + gapSize) {
				var additionalObstacle = new Obstacle();
				additionalObstacle.x = obstacleX;
				additionalObstacle.y = obstacleY;
				obstacles.push(additionalObstacle);
				game.addChild(additionalObstacle);
			}
		}
		// Add obstacles specifically in character's current area for Level 4, but fewer at the beginning
		var characterAreaObstacles = obstacleCounter > 2 ? 3 + Math.floor(seededRandom * 2) : 1 + Math.floor(seededRandom * 1); // Start with 1-2 obstacles, then 3-4
		for (var k = 0; k < characterAreaObstacles; k++) {
			var charAreaSeed = (seed + k * 2000 + 500) % 9973;
			var charAreaRandom = (charAreaSeed * 9301 + 49297) % 233280 / 233280;
			// Place obstacles in character's vicinity (around x=300, y=800)
			var charObstacleX = baseX + 100 + charAreaRandom * 300; // Close to current obstacles
			var charObstacleY = bird.y - 400 + charAreaRandom * 800; // Around character's Y position
			// Ensure obstacles are within screen bounds and not in gap
			if (charObstacleY > 100 && charObstacleY < 2500 && (charObstacleY < gapPosition || charObstacleY > gapPosition + gapSize)) {
				var charAreaObstacle = new Obstacle();
				charAreaObstacle.x = charObstacleX;
				charAreaObstacle.y = charObstacleY;
				obstacles.push(charAreaObstacle);
				game.addChild(charAreaObstacle);
			}
		}
	}
	obstacleCounter++;
	lastObstacle = LK.ticks;
	// Create hearts based on missed hearts count (minimum 1, add 1 for each missed)
	var heartsToCreate = 1 + missedHearts;
	for (var heartIndex = 0; heartIndex < heartsToCreate; heartIndex++) {
		var heart = new Heart();
		heart.x = baseX + 30; // Position heart 30 pixels ahead of obstacle
		// Spread multiple hearts vertically in the gap area
		if (heartsToCreate === 1) {
			heart.y = gapPosition + gapSize / 2; // Center single heart in the gap area
		} else {
			// Distribute multiple hearts evenly across the gap
			var heartSpacing = gapSize / (heartsToCreate + 1);
			heart.y = gapPosition + heartSpacing * (heartIndex + 1);
		}
		hearts.push(heart);
		game.addChild(heart);
	}
}
function checkCollisions() {
	// Check ground collision - game over when bird touches ground
	if (bird.y + 60 >= ground.y) {
		// Show game over screen with level button
		showGameOverWithLevelButton();
		return;
	}
	// Check obstacle collisions - bounce off obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		// Skip if obstacle is undefined
		if (!obstacle) {
			obstacles.splice(i, 1);
			continue;
		}
		if (bird.intersects(obstacle)) {
			// Check if it's a door - level progression
			if (obstacle.obstacleType === 'door') {
				// Flash screen gold to indicate level progression
				LK.effects.flashScreen(0xffd700, 500);
				// Advance to next level
				totalScore += LK.getScore();
				storage.totalScore = totalScore;
				// Unlock next level if not already unlocked
				if (currentLevel >= unlockedLevels) {
					unlockedLevels = currentLevel + 1;
					storage.unlockedLevels = unlockedLevels;
				}
				// Advance to next level
				currentLevel++;
				storage.currentLevel = currentLevel;
				levelTxt.setText('Level ' + currentLevel);
				// Reset score for new level
				LK.setScore(0);
				scoreTxt.setText(0);
				// Reset obstacle counter for consistent level maps
				obstacleCounter = 0;
				// Clear all obstacles
				for (var j = obstacles.length - 1; j >= 0; j--) {
					obstacles[j].destroy();
					obstacles.splice(j, 1);
				}
				// Generate new obstacle sequence for the new level
				generateLevelObstacleSequence();
				updateLevelProgress();
				// Increase difficulty for new level
				updateDifficultyForLevel();
				// Reset bird position
				bird.x = 300;
				bird.y = 800;
				bird.velocityY = 0;
				bird.completedFlips = 0;
				// Reset health
				resetHealth();
				// Create initial obstacle for new level
				createObstacle();
				return; // Exit collision check to avoid other collision handling
			}
			// Check if it's a rest platform - safe area
			if (obstacle.obstacleType === 'restPlatform') {
				// Safe collision - just bounce without damage
				var distanceX = bird.x - obstacle.x;
				var distanceY = bird.y - obstacle.y;
				var totalDistance = Math.sqrt(distanceX * distanceX + distanceY * distanceY);
				if (totalDistance > 0) {
					var normalX = distanceX / totalDistance;
					var normalY = distanceY / totalDistance;
					// Gentle push away from platform
					var pushForce = 3;
					bird.x += normalX * pushForce;
					bird.y += normalY * pushForce;
					// Apply gentle bounce velocity
					bird.velocityY = normalY * 3;
					// Visual feedback for landing on safe platform
					LK.effects.flashObject(obstacle, 0x00ff88, 300);
				}
				continue; // Skip damage dealing
			}
			// Only take damage if not already damaged from this obstacle
			if (!obstacle.damagedBird) {
				takeDamage();
				obstacle.damagedBird = true; // Mark this obstacle as having caused damage
			}
			// Calculate collision direction
			var distanceX = bird.x - obstacle.x;
			var distanceY = bird.y - obstacle.y;
			var totalDistance = Math.sqrt(distanceX * distanceX + distanceY * distanceY);
			// Normalize collision direction
			if (totalDistance > 0) {
				var normalX = distanceX / totalDistance;
				var normalY = distanceY / totalDistance;
				// Push bird away from obstacle
				var pushForce = 8;
				bird.x += normalX * pushForce;
				bird.y += normalY * pushForce;
				// Apply bounce velocity
				var bounceForce = 5;
				bird.velocityY = normalY * bounceForce;
				// Play flap sound for bounce feedback
				LK.getSound('flap').play();
			}
		}
		// Check if bird passed obstacle
		if (!obstacle.passed && obstacle.x + 100 < bird.x) {
			obstacle.passed = true;
			// Award points for passing any obstacle
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore());
			LK.getSound('score').play();
			updateLevelProgress();
		}
		// Remove off-screen obstacles (but keep stationary gears and rest platforms)
		if (obstacle.x < -100 && !obstacle.isStationary) {
			// Add flash effect when obstacle disappears
			LK.effects.flashObject(obstacle, 0xffffff, 200);
			obstacle.destroy();
			obstacles.splice(i, 1);
		}
	}
	// Check heart collections
	for (var h = hearts.length - 1; h >= 0; h--) {
		var heart = hearts[h];
		// Skip if heart is undefined
		if (!heart) {
			hearts.splice(h, 1);
			continue;
		}
		// Check if bird collected the heart
		if (bird.intersects(heart) && !heart.collected) {
			heart.collected = true;
			// Reset missed hearts counter when collecting a heart
			missedHearts = 0;
			// Always increase health (no maximum limit)
			playerHealth++;
			healthTxt.setText('Lives: ' + playerHealth);
			// Visual feedback for collecting heart
			tween(heart, {
				scaleX: 2,
				scaleY: 2,
				alpha: 0
			}, {
				duration: 300,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					heart.destroy();
				}
			});
			// Flash screen green briefly
			LK.effects.flashScreen(0x00ff00, 200);
			// Play score sound as feedback
			LK.getSound('score').play();
			hearts.splice(h, 1);
			continue;
		}
		// Remove off-screen hearts
		if (heart.x < -100) {
			// Track that this heart was missed
			missedHearts++;
			heart.destroy();
			hearts.splice(h, 1);
		}
	}
	// Check portal collisions
	for (var p = portals.length - 1; p >= 0; p--) {
		var portal = portals[p];
		// Skip if portal is undefined
		if (!portal) {
			portals.splice(p, 1);
			continue;
		}
		if (bird.intersects(portal)) {
			// Flash screen purple to indicate portal entry
			LK.effects.flashScreen(0x9966ff, 800);
			// Advance to next level
			totalScore += LK.getScore();
			storage.totalScore = totalScore;
			// Unlock next level if not already unlocked
			if (currentLevel >= unlockedLevels) {
				unlockedLevels = currentLevel + 1;
				storage.unlockedLevels = unlockedLevels;
			}
			// Advance to next level
			currentLevel++;
			storage.currentLevel = currentLevel;
			levelTxt.setText('Level ' + currentLevel);
			// Reset score for new level
			LK.setScore(0);
			scoreTxt.setText(0);
			// Reset obstacle counter for consistent level maps
			obstacleCounter = 0;
			// Clear all obstacles
			for (var j = obstacles.length - 1; j >= 0; j--) {
				obstacles[j].destroy();
				obstacles.splice(j, 1);
			}
			// Clear all portals
			for (var pt = portals.length - 1; pt >= 0; pt--) {
				portals[pt].destroy();
				portals.splice(pt, 1);
			}
			// Generate new obstacle sequence for the new level
			generateLevelObstacleSequence();
			updateLevelProgress();
			// Increase difficulty for new level
			updateDifficultyForLevel();
			// Reset bird position
			bird.x = 300;
			bird.y = 800;
			bird.velocityY = 0;
			bird.completedFlips = 0;
			// Reset health
			resetHealth();
			// Reset portal spawned flag
			portalSpawned = false;
			// Create initial obstacle for new level
			createObstacle();
			return; // Exit collision check to avoid other collision handling
		}
		// Remove off-screen portals
		if (portal.x < -200) {
			portal.destroy();
			portals.splice(p, 1);
		}
	}
	// Check ceiling collision
	if (bird.y < 50) {
		bird.y = 50;
		bird.velocityY = 0;
	}
}
game.down = function (x, y, obj) {
	if (!gameStarted) {
		startGame();
	}
	bird.flap();
};
game.update = function () {
	if (!gameStarted) return;
	// Create obstacles
	if (LK.ticks - lastObstacle > obstacleSpacing) {
		createObstacle();
	}
	// Create background shapes
	if (LK.ticks - lastBackgroundShape > backgroundShapeSpacing) {
		createBackgroundShape();
		lastBackgroundShape = LK.ticks;
	}
	// Hearts are now created after each obstacle, so no timer-based spawning needed
	// Update bird physics
	bird.update();
	// Update obstacles
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].update();
	}
	// Update hearts
	for (var h = 0; h < hearts.length; h++) {
		hearts[h].update();
	}
	// Update portals
	for (var p = 0; p < portals.length; p++) {
		portals[p].update();
	}
	// Update background shapes
	for (var j = backgroundShapes.length - 1; j >= 0; j--) {
		var bgShape = backgroundShapes[j];
		bgShape.update();
		// Remove off-screen background shapes
		if (bgShape.x < -200) {
			bgShape.destroy();
			backgroundShapes.splice(j, 1);
		}
	}
	// Check collisions
	checkCollisions();
	// Level-based difficulty progression
	var baseSpacing = 400 - (currentLevel - 1) * 20;
	var minSpacing = Math.max(200, 300 - (currentLevel - 1) * 10);
	var reductionRate = 1 + currentLevel; // Increase reduction rate with level
	var currentSpacing = baseSpacing - LK.getScore() * reductionRate;
	obstacleSpacing = Math.max(minSpacing, currentSpacing);
};
function showGameOverWithLevelButton() {
	resetToLevelStart();
	LK.showGameOver();
}

===================================================================
--- original.js
+++ change.js
@@ -300,20 +300,8 @@
 	var levelProgress = LK.getScore();
 	var progressNeeded = levelScoreThreshold * currentLevel;
 	// Update progress display
 	progressTxt.setText('Progress: ' + levelProgress + '/' + progressNeeded);
-	// Check if level threshold is reached and portal not yet spawned
-	if (levelProgress >= progressNeeded && !portalSpawned) {
-		// Spawn portal for level transition
-		var portal = new Portal();
-		portal.x = 2200; // Start off-screen right
-		portal.y = 1366; // Center of screen vertically
-		portals.push(portal);
-		game.addChild(portal);
-		portalSpawned = true;
-		// Flash screen blue to indicate portal spawn
-		LK.effects.flashScreen(0x0066ff, 500);
-	}
 }
 function updateDifficultyForLevel() {
 	// Each level increases difficulty
 	var difficultyMultiplier = 1 + (currentLevel - 1) * 0.3;