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

/**** 
* Classes
****/ 
var Collectible = Container.expand(function (type) {
	var self = Container.call(this);
	self.type = 'coin';
	var assetId = 'coin';
	var collectibleGraphics = self.attachAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.collected = false;
	self.update = function () {
		self.x -= gameSpeed;
		// Floating animation
		self.y += Math.sin(LK.ticks / 10) * 0.5;
		// Rotation for coins
		collectibleGraphics.rotation += 0.05;
		// Remove if off screen
		if (self.x < -100) {
			self.destroy();
		}
	};
	return self;
});
var Giantess = Container.expand(function () {
	var self = Container.call(this);
	var giantessGraphics = self.attachAsset('giantess', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.baseSpeed = 2;
	self.speed = self.baseSpeed;
	self.maxSpeed = 7;
	self.distanceFromPlayer = 400;
	self.update = function () {
		// Follow player with increasing difficulty
		var targetX = hero.x - self.distanceFromPlayer;
		self.x += (targetX - self.x) * 0.03;
		// Simulate walking animation
		if (LK.ticks % 20 === 0) {
			var currentY = self.y;
			tween(self, {
				y: currentY - 10
			}, {
				duration: 100,
				onFinish: function onFinish() {
					tween(self, {
						y: currentY
					}, {
						duration: 100
					});
				}
			});
		}
	};
	self.increaseSpeed = function () {
		self.speed = Math.min(self.maxSpeed, self.speed + 0.1);
		self.distanceFromPlayer = Math.max(200, self.distanceFromPlayer - 5);
	};
	return self;
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityY = 0;
	self.gravity = 0.8;
	self.jumpForce = -20;
	self.isJumping = false;
	self.isInvincible = false;
	self.jump = function () {
		if (!self.isJumping) {
			self.velocityY = self.jumpForce;
			self.isJumping = true;
			LK.getSound('jump').play();
		}
	};
	self.makeInvincible = function (duration) {
		self.isInvincible = true;
		// Flash effect for invincibility
		var flashInterval = LK.setInterval(function () {
			heroGraphics.alpha = heroGraphics.alpha === 1 ? 0.3 : 1;
		}, 100);
		LK.setTimeout(function () {
			self.isInvincible = false;
			heroGraphics.alpha = 1;
			LK.clearInterval(flashInterval);
		}, duration);
	};
	self.update = function () {
		// Apply gravity
		self.velocityY += self.gravity;
		self.y += self.velocityY;
		// Check if on ground
		if (self.y >= groundY - heroGraphics.height / 2) {
			self.y = groundY - heroGraphics.height / 2;
			self.velocityY = 0;
			self.isJumping = false;
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Game variables
var gameSpeed = 5;
var score = 0;
var coins = 0;
var groundY = 2500;
var obstacles = []; // (obstacles array kept for compatibility, but will not be used)
var collectibles = [];
var gameRunning = true;
var difficulty = 1;
var distanceTraveled = 0;
// Create ground
var ground = game.addChild(LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: groundY
}));
// Create hero
var hero = game.addChild(new Hero());
hero.x = 400;
hero.y = groundY - 100;
// Create giantess
var giantess = game.addChild(new Giantess());
giantess.x = -100;
giantess.y = groundY - 350;
// Setup UI
var scoreTxt = new Text2('Distance: 0m', {
	size: 70,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 50;
var coinsTxt = new Text2('Coins: 0', {
	size: 70,
	fill: 0xF1C40F
});
coinsTxt.anchor.set(0, 0);
LK.gui.topRight.addChild(coinsTxt);
coinsTxt.x = -300;
coinsTxt.y = 50;
// Play background music
LK.playMusic('background_music');
// Game functions
// spawnObstacle removed
function spawnCollectible() {
	var collectible = new Collectible('coin');
	collectible.x = 2200 + Math.random() * 100;
	// Position higher for jumps or on ground
	if (Math.random() < 0.6) {
		collectible.y = groundY - 100 - Math.random() * 150;
	} else {
		collectible.y = groundY - collectible.height / 2;
	}
	game.addChild(collectible);
	collectibles.push(collectible);
}
function updateScore() {
	distanceTraveled += gameSpeed / 30;
	score = Math.floor(distanceTraveled);
	scoreTxt.setText('Distance: ' + score + 'm');
	// Increase difficulty over time
	if (score % 200 === 0 && score > 0 && gameSpeed < 12) {
		gameSpeed += 0.5;
		difficulty += 0.2;
		giantess.increaseSpeed();
	}
}
function updateCoins() {
	coinsTxt.setText('Coins: ' + coins);
}
function checkCollisions() {
	// Obstacle collision logic removed
	// Check collectible collisions
	for (var j = collectibles.length - 1; j >= 0; j--) {
		if (hero.intersects(collectibles[j]) && !collectibles[j].collected) {
			collectibles[j].collected = true;
			// Collect coin
			coins++;
			updateCoins();
			LK.getSound('coin_collect').play();
			// Remove the collectible
			collectibles[j].destroy();
			collectibles.splice(j, 1);
		}
	}
	// Check giantess collision - Game Over
	if (hero.intersects(giantess) && !hero.isInvincible) {
		gameOver();
	}
}
function gameOver() {
	gameRunning = false;
	// Save high score
	if (score > storage.highScore) {
		storage.highScore = score;
	}
	// Update score with final
	LK.setScore(score);
	// Flash screen red and show game over
	LK.effects.flashScreen(0xff0000, 1000);
	LK.setTimeout(function () {
		LK.showGameOver();
	}, 1000);
}
// Input handlers
game.down = function (x, y, obj) {
	// Jump when touching the screen
	hero.jump();
};
// Main game loop
game.update = function () {
	if (!gameRunning) return;
	// Update game objects
	hero.update();
	giantess.update();
	// Obstacle update and spawn logic removed
	for (var j = collectibles.length - 1; j >= 0; j--) {
		collectibles[j].update();
		if (!collectibles[j].parent) {
			collectibles.splice(j, 1);
		}
	}
	// Spawn obstacles
	// Spawn collectibles
	if (LK.ticks % Math.floor(60 / difficulty) === 0) {
		spawnCollectible();
	}
	// Update score
	updateScore();
	// Check collisions
	checkCollisions();
	// Update game state
	if (hero.x < 100) {
		hero.x = 100; // Keep hero from moving off screen to the left
	}
};

===================================================================
--- original.js
+++ change.js
@@ -10,10 +10,10 @@
 * Classes
 ****/ 
 var Collectible = Container.expand(function (type) {
 	var self = Container.call(this);
-	self.type = type || 'coin';
-	var assetId = self.type === 'coin' ? 'coin' : 'powerup';
+	self.type = 'coin';
+	var assetId = 'coin';
 	var collectibleGraphics = self.attachAsset(assetId, {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
@@ -22,11 +22,9 @@
 		self.x -= gameSpeed;
 		// Floating animation
 		self.y += Math.sin(LK.ticks / 10) * 0.5;
 		// Rotation for coins
-		if (self.type === 'coin') {
-			collectibleGraphics.rotation += 0.05;
-		}
+		collectibleGraphics.rotation += 0.05;
 		// Remove if off screen
 		if (self.x < -100) {
 			self.destroy();
 		}
@@ -170,10 +168,9 @@
 LK.playMusic('background_music');
 // Game functions
 // spawnObstacle removed
 function spawnCollectible() {
-	var type = Math.random() < 0.2 ? 'powerup' : 'coin';
-	var collectible = new Collectible(type);
+	var collectible = new Collectible('coin');
 	collectible.x = 2200 + Math.random() * 100;
 	// Position higher for jumps or on ground
 	if (Math.random() < 0.6) {
 		collectible.y = groundY - 100 - Math.random() * 150;
@@ -202,19 +199,12 @@
 	// Check collectible collisions
 	for (var j = collectibles.length - 1; j >= 0; j--) {
 		if (hero.intersects(collectibles[j]) && !collectibles[j].collected) {
 			collectibles[j].collected = true;
-			if (collectibles[j].type === 'coin') {
-				// Collect coin
-				coins++;
-				updateCoins();
-				LK.getSound('coin_collect').play();
-			} else {
-				// Collect power-up
-				LK.getSound('powerup_collect').play();
-				hero.makeInvincible(5000);
-				gameSpeed += 1;
-			}
+			// Collect coin
+			coins++;
+			updateCoins();
+			LK.getSound('coin_collect').play();
 			// Remove the collectible
 			collectibles[j].destroy();
 			collectibles.splice(j, 1);
 		}