/**** 
* Classes
****/ 
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Define a ClickableCircle class
var ClickableCircle = Container.expand(function () {
	var self = Container.call(this);
	self.coinsPerClick = 1;
	// Create and attach a circle asset
	var circleGraphics = self.attachAsset('circle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Event handler for when the circle is clicked
	self.down = function (x, y, obj) {
		// Increase score by coinsPerClick when the circle is clicked
		LK.setScore(LK.getScore() + self.coinsPerClick);
		scoreTxt.setText(LK.getScore());
	};
});
var Upgrade = Container.expand(function () {
	var self = Container.call(this);
	self.cost = 200;
	// Create and attach an upgrade asset
	var upgradeGraphics = self.attachAsset('Upgrade', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add cost text to the upgrade button
	self.costTxt = new Text2(self.cost.toString(), {
		size: 100,
		fill: 0x000000
	});
	self.costTxt.anchor.set(0.5, 0.5);
	self.addChild(self.costTxt);
	// Event handler for when the upgrade is clicked
	self.down = function (x, y, obj) {
		// Check if the player has enough points to purchase the upgrade
		if (LK.getScore() >= self.cost) {
			// Deduct the cost of the upgrade from the score
			LK.setScore(LK.getScore() - self.cost);
			scoreTxt.setText(LK.getScore());
			// Increase coins per click by 1 when the upgrade is clicked
			circle.coinsPerClick += 5;
			// Update the cost text
			self.costTxt.setText(self.cost.toString());
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 //Init game with black background 
});

/**** 
* Game Code
****/ 
// Initialize score text
var scoreTxt = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Create a clickable circle and add it to the game
var circle = game.addChild(new ClickableCircle());
circle.x = 2048 / 2;
circle.y = 2732 / 2;
// Create an upgrade and add it to the game
var upgrade = game.addChild(new Upgrade());
upgrade.x = 2048 / 2;
upgrade.y = 2732 / 3;
// Create a second upgrade and add it to the game
var upgrade2 = game.addChild(new Upgrade());
upgrade2.costTxt.setText(upgrade2.cost.toString());
upgrade2.x = 2048 / 2 + 350;
upgrade2.y = 2732 / 3;
// Update function called every game tick
game.update = function () {
	// Game logic can be added here if needed
};

===================================================================
--- original.js
+++ change.js
@@ -27,14 +27,14 @@
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
 	// Add cost text to the upgrade button
-	var costTxt = new Text2(self.cost.toString(), {
+	self.costTxt = new Text2(self.cost.toString(), {
 		size: 100,
 		fill: 0x000000
 	});
-	costTxt.anchor.set(0.5, 0.5);
-	self.addChild(costTxt);
+	self.costTxt.anchor.set(0.5, 0.5);
+	self.addChild(self.costTxt);
 	// Event handler for when the upgrade is clicked
 	self.down = function (x, y, obj) {
 		// Check if the player has enough points to purchase the upgrade
 		if (LK.getScore() >= self.cost) {
@@ -43,9 +43,9 @@
 			scoreTxt.setText(LK.getScore());
 			// Increase coins per click by 1 when the upgrade is clicked
 			circle.coinsPerClick += 5;
 			// Update the cost text
-			costTxt.setText(self.cost.toString());
+			self.costTxt.setText(self.cost.toString());
 		}
 	};
 });