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

/**** 
* Classes
****/ 
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.isFlipped = false;
	self.baseY = 1366; // Middle of screen (2732 / 2)
	self.flippedY = 683; // Upper third
	self.velocity = 0;
	self.gravity = 0.4;
	self.maxVelocity = 15;
	self.flip = function () {
		self.isFlipped = !self.isFlipped;
		var targetY = self.isFlipped ? self.flippedY : self.baseY;
		tween(self, {
			y: targetY
		}, {
			duration: 200,
			easing: tween.easeInOut
		});
		LK.getSound('flip').play();
	};
	self.update = function () {
		if (!self.isFlipped) {
			self.velocity += self.gravity;
			if (self.velocity > self.maxVelocity) {
				self.velocity = self.maxVelocity;
			}
		} else {
			self.velocity -= self.gravity;
			if (self.velocity < -self.maxVelocity) {
				self.velocity = -self.maxVelocity;
			}
		}
		self.y += self.velocity;
		// Boundary check
		if (self.y < 30) {
			self.y = 30;
			self.velocity = 0;
		}
		if (self.y > 2702) {
			self.y = 2702;
			self.velocity = 0;
		}
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	self.speed = 8;
	self.gapSize = 300;
	self.gapPosition = 0; // 0 = top, 1 = middle, 2 = bottom
	var topPart = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var bottomPart = LK.getAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(bottomPart);
	self.setupObstacle = function (position) {
		self.gapPosition = position;
		var obstacleHeight = 200;
		var screenHeight = 2732;
		var gapSize = self.gapSize;
		var totalHeight = screenHeight - gapSize;
		if (position === 0) {
			// Gap at top
			topPart.y = -gapSize / 2 - obstacleHeight / 2;
			bottomPart.y = gapSize / 2 + obstacleHeight / 2;
		} else if (position === 1) {
			// Gap in middle
			topPart.y = -(gapSize / 2 + obstacleHeight / 2);
			bottomPart.y = gapSize / 2 + obstacleHeight / 2;
		} else {
			// Gap at bottom
			topPart.y = -gapSize / 2 - obstacleHeight / 2;
			bottomPart.y = screenHeight - gapSize / 2 + obstacleHeight / 2;
		}
	};
	self.update = function () {
		self.x -= self.speed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var bird;
var obstacles = [];
var score = 0;
var gameActive = false;
var obstacleSpawnRate = 80;
var spawnCounter = 0;
var difficulty = 1;
var difficultyIncrement = 0.0002;
var scoreTxt;
var currentPass = 1;
var maxPassUnlocked = 1;
// Load saved pass data
maxPassUnlocked = storage.maxPassUnlocked || 1;
// Pass configuration system
var passConfig = {
	1: {
		name: 'Rookie',
		difficultyMultiplier: 0.8,
		spawnRate: 100,
		reward: 'Bronze Badge'
	},
	2: {
		name: 'Pro',
		difficultyMultiplier: 1.0,
		spawnRate: 80,
		reward: 'Silver Badge'
	},
	3: {
		name: 'Expert',
		difficultyMultiplier: 1.2,
		spawnRate: 60,
		reward: 'Gold Badge'
	},
	4: {
		name: 'Master',
		difficultyMultiplier: 1.5,
		spawnRate: 50,
		reward: 'Platinum Badge'
	},
	5: {
		name: 'Legend',
		difficultyMultiplier: 1.8,
		spawnRate: 40,
		reward: 'Diamond Badge'
	}
};
var currentPassConfig = passConfig[currentPass];
function initializeGame() {
	if (bird) {
		bird.destroy();
	}
	bird = game.addChild(new Bird());
	bird.x = 300;
	bird.y = bird.baseY;
	obstacles = [];
	score = 0;
	gameActive = true;
	spawnCounter = 0;
	difficulty = 1;
	currentPassConfig = passConfig[currentPass];
	obstacleSpawnRate = currentPassConfig.spawnRate;
	if (!scoreTxt) {
		scoreTxt = new Text2('0', {
			size: 100,
			fill: 0x000000
		});
		scoreTxt.anchor.set(0.5, 0);
		LK.gui.top.addChild(scoreTxt);
	}
	updateScore();
	hideMainMenu();
}
function showMainMenu() {
	gameActive = false;
	LK.gui.center.removeChildren();
	var menuContainer = new Container();
	LK.gui.center.addChild(menuContainer);
	var titleTxt = new Text2('FLIPY BIRD YAP', {
		size: 80,
		fill: 0x000000
	});
	titleTxt.anchor.set(0.5, 0.5);
	titleTxt.y = -200;
	menuContainer.addChild(titleTxt);
	var currentPassData = passConfig[currentPass];
	var passLabelTxt = new Text2('Pass: ' + currentPass + ' / ' + maxPassUnlocked, {
		size: 50,
		fill: 0x000000
	});
	passLabelTxt.anchor.set(0.5, 0.5);
	passLabelTxt.y = -50;
	menuContainer.addChild(passLabelTxt);
	var passNameTxt = new Text2(currentPassData.name + ' - ' + currentPassData.reward, {
		size: 35,
		fill: 0x4CAF50
	});
	passNameTxt.anchor.set(0.5, 0.5);
	passNameTxt.y = 20;
	menuContainer.addChild(passNameTxt);
	var playButtonBg = LK.getAsset('gap', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	playButtonBg.tint = 0x4CAF50;
	playButtonBg.x = 0;
	playButtonBg.y = 80;
	playButtonBg.width = 300;
	playButtonBg.height = 100;
	menuContainer.addChild(playButtonBg);
	var playTxt = new Text2('PLAY', {
		size: 60,
		fill: 0xffffff
	});
	playTxt.anchor.set(0.5, 0.5);
	playTxt.x = 0;
	playTxt.y = 80;
	menuContainer.addChild(playTxt);
	playButtonBg.interactive = true;
	playButtonBg.down = function () {
		initializeGame();
	};
	if (currentPass > 1) {
		var prevButtonBg = LK.getAsset('gap', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		prevButtonBg.tint = 0x2196F3;
		prevButtonBg.x = -180;
		prevButtonBg.y = 250;
		prevButtonBg.width = 120;
		prevButtonBg.height = 80;
		menuContainer.addChild(prevButtonBg);
		var prevTxt = new Text2('<', {
			size: 50,
			fill: 0xffffff
		});
		prevTxt.anchor.set(0.5, 0.5);
		prevTxt.x = -180;
		prevTxt.y = 250;
		menuContainer.addChild(prevTxt);
		prevButtonBg.interactive = true;
		prevButtonBg.down = function () {
			currentPass = Math.max(1, currentPass - 1);
			currentPassConfig = passConfig[currentPass];
			showMainMenu();
		};
	}
	if (currentPass < maxPassUnlocked) {
		var nextButtonBg = LK.getAsset('gap', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		nextButtonBg.tint = 0x2196F3;
		nextButtonBg.x = 180;
		nextButtonBg.y = 250;
		nextButtonBg.width = 120;
		nextButtonBg.height = 80;
		menuContainer.addChild(nextButtonBg);
		var nextTxt = new Text2('>', {
			size: 50,
			fill: 0xffffff
		});
		nextTxt.anchor.set(0.5, 0.5);
		nextTxt.x = 180;
		nextTxt.y = 250;
		menuContainer.addChild(nextTxt);
		nextButtonBg.interactive = true;
		nextButtonBg.down = function () {
			currentPass = Math.min(maxPassUnlocked, currentPass + 1);
			currentPassConfig = passConfig[currentPass];
			showMainMenu();
		};
	}
}
function hideMainMenu() {
	LK.gui.center.removeChildren();
}
function updateScore() {
	scoreTxt.setText(score);
	LK.setScore(score);
}
function spawnObstacle() {
	var obstacle = game.addChild(new Obstacle());
	obstacle.x = 2048 + 200;
	obstacle.y = 1366;
	var positions = [0, 1, 2];
	var randomPosition = positions[Math.floor(Math.random() * positions.length)];
	obstacle.setupObstacle(randomPosition);
	obstacle.passed = false;
	obstacles.push(obstacle);
}
function endGame() {
	gameActive = false;
	LK.effects.flashScreen(0xFF0000, 500);
	LK.getSound('hit').play();
	LK.setTimeout(function () {
		LK.showGameOver();
	}, 500);
}
game.down = function (x, y, obj) {
	if (gameActive) {
		bird.flip();
	}
};
game.move = function (x, y, obj) {
	// Empty move handler required for touch compatibility
};
game.up = function (x, y, obj) {
	// Empty up handler
};
game.update = function () {
	if (!gameActive) {
		return;
	}
	// Update difficulty
	difficulty += difficultyIncrement * currentPassConfig.difficultyMultiplier;
	obstacleSpawnRate = Math.max(40, currentPassConfig.spawnRate - Math.floor(difficulty * 5));
	// Update bird
	bird.update();
	// Spawn obstacles
	spawnCounter++;
	if (spawnCounter >= obstacleSpawnRate) {
		spawnObstacle();
		spawnCounter = 0;
	}
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		obstacle.speed = (8 + difficulty * 0.5) * currentPassConfig.difficultyMultiplier;
		obstacle.update();
		// Check if bird passed obstacle
		if (!obstacle.passed && bird.x > obstacle.x) {
			obstacle.passed = true;
			score++;
			updateScore();
			LK.getSound('score').play();
			// Win condition
			if (score >= 50) {
				gameActive = false;
				if (currentPass === maxPassUnlocked) {
					maxPassUnlocked++;
					storage.maxPassUnlocked = maxPassUnlocked;
				}
				LK.effects.flashScreen(0x00FF00, 500);
				LK.setTimeout(function () {
					LK.showYouWin();
				}, 500);
				return;
			}
		}
		// Check collision with bird
		var birdRadius = 30;
		var obstacleWidth = 80;
		var gapSize = obstacle.gapSize;
		var obstacleHeight = 200;
		var birdLeft = bird.x - birdRadius;
		var birdRight = bird.x + birdRadius;
		var birdTop = bird.y - birdRadius;
		var birdBottom = bird.y + birdRadius;
		var obstacleLeft = obstacle.x - obstacleWidth / 2;
		var obstacleRight = obstacle.x + obstacleWidth / 2;
		if (birdRight > obstacleLeft && birdLeft < obstacleRight) {
			// Check vertical collision
			var gapCenter = obstacle.y;
			var gapTop = gapCenter - gapSize / 2;
			var gapBottom = gapCenter + gapSize / 2;
			if (birdTop < gapTop || birdBottom > gapBottom) {
				endGame();
				return;
			}
		}
		// Remove off-screen obstacles
		if (obstacle.x < -200) {
			obstacle.destroy();
			obstacles.splice(i, 1);
		}
	}
	// Boundary collision
	if (bird.y - 30 <= 0 || bird.y + 30 >= 2732) {
		endGame();
		return;
	}
};
LK.playMusic('bgmusic', {
	loop: true
});
showMainMenu();

===================================================================
--- original.js
+++ change.js
@@ -119,8 +119,42 @@
 var currentPass = 1;
 var maxPassUnlocked = 1;
 // Load saved pass data
 maxPassUnlocked = storage.maxPassUnlocked || 1;
+// Pass configuration system
+var passConfig = {
+	1: {
+		name: 'Rookie',
+		difficultyMultiplier: 0.8,
+		spawnRate: 100,
+		reward: 'Bronze Badge'
+	},
+	2: {
+		name: 'Pro',
+		difficultyMultiplier: 1.0,
+		spawnRate: 80,
+		reward: 'Silver Badge'
+	},
+	3: {
+		name: 'Expert',
+		difficultyMultiplier: 1.2,
+		spawnRate: 60,
+		reward: 'Gold Badge'
+	},
+	4: {
+		name: 'Master',
+		difficultyMultiplier: 1.5,
+		spawnRate: 50,
+		reward: 'Platinum Badge'
+	},
+	5: {
+		name: 'Legend',
+		difficultyMultiplier: 1.8,
+		spawnRate: 40,
+		reward: 'Diamond Badge'
+	}
+};
+var currentPassConfig = passConfig[currentPass];
 function initializeGame() {
 	if (bird) {
 		bird.destroy();
 	}
@@ -131,9 +165,10 @@
 	score = 0;
 	gameActive = true;
 	spawnCounter = 0;
 	difficulty = 1;
-	obstacleSpawnRate = 80;
+	currentPassConfig = passConfig[currentPass];
+	obstacleSpawnRate = currentPassConfig.spawnRate;
 	if (!scoreTxt) {
 		scoreTxt = new Text2('0', {
 			size: 100,
 			fill: 0x000000
@@ -155,15 +190,23 @@
 	});
 	titleTxt.anchor.set(0.5, 0.5);
 	titleTxt.y = -200;
 	menuContainer.addChild(titleTxt);
+	var currentPassData = passConfig[currentPass];
 	var passLabelTxt = new Text2('Pass: ' + currentPass + ' / ' + maxPassUnlocked, {
 		size: 50,
 		fill: 0x000000
 	});
 	passLabelTxt.anchor.set(0.5, 0.5);
 	passLabelTxt.y = -50;
 	menuContainer.addChild(passLabelTxt);
+	var passNameTxt = new Text2(currentPassData.name + ' - ' + currentPassData.reward, {
+		size: 35,
+		fill: 0x4CAF50
+	});
+	passNameTxt.anchor.set(0.5, 0.5);
+	passNameTxt.y = 20;
+	menuContainer.addChild(passNameTxt);
 	var playButtonBg = LK.getAsset('gap', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
@@ -206,8 +249,9 @@
 		menuContainer.addChild(prevTxt);
 		prevButtonBg.interactive = true;
 		prevButtonBg.down = function () {
 			currentPass = Math.max(1, currentPass - 1);
+			currentPassConfig = passConfig[currentPass];
 			showMainMenu();
 		};
 	}
 	if (currentPass < maxPassUnlocked) {
@@ -231,8 +275,9 @@
 		menuContainer.addChild(nextTxt);
 		nextButtonBg.interactive = true;
 		nextButtonBg.down = function () {
 			currentPass = Math.min(maxPassUnlocked, currentPass + 1);
+			currentPassConfig = passConfig[currentPass];
 			showMainMenu();
 		};
 	}
 }
@@ -276,10 +321,10 @@
 	if (!gameActive) {
 		return;
 	}
 	// Update difficulty
-	difficulty += difficultyIncrement;
-	obstacleSpawnRate = Math.max(40, 80 - Math.floor(difficulty * 5));
+	difficulty += difficultyIncrement * currentPassConfig.difficultyMultiplier;
+	obstacleSpawnRate = Math.max(40, currentPassConfig.spawnRate - Math.floor(difficulty * 5));
 	// Update bird
 	bird.update();
 	// Spawn obstacles
 	spawnCounter++;
@@ -289,9 +334,9 @@
 	}
 	// Update obstacles
 	for (var i = obstacles.length - 1; i >= 0; i--) {
 		var obstacle = obstacles[i];
-		obstacle.speed = 8 + difficulty * 0.5;
+		obstacle.speed = (8 + difficulty * 0.5) * currentPassConfig.difficultyMultiplier;
 		obstacle.update();
 		// Check if bird passed obstacle
 		if (!obstacle.passed && bird.x > obstacle.x) {
 			obstacle.passed = true;