===================================================================
--- original.js
+++ change.js
@@ -15,8 +15,18 @@
 	};
 	// Add a cursor to the button
 	self.cursor = 'pointer';
 });
+// Define a simple UpgradeButton class that will be used for the upgrade button
+var UpgradeButton = Container.expand(function () {
+	var self = Container.call(this);
+	var buttonGraphics = self.attachAsset('button', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Add a cursor to the button
+	self.cursor = 'pointer';
+});
 
 /**** 
 * Initialize Game
 ****/ 
@@ -26,11 +36,12 @@
 
 /**** 
 * Game Code
 ****/ 
-// Initialize score, high score and score text
+// Initialize score, high score, score multiplier and score text
 var score = 0;
 var highScore = 0;
+var scoreMultiplier = 1;
 var scoreTxt = new Text2('0', {
 	size: 300,
 	fill: "#ffffff",
 	font: "'.VnAvant', serif",
@@ -54,11 +65,14 @@
 }));
 var button = game.addChild(new Button());
 button.x = 2048 / 2;
 button.y = 2732 / 2;
+var upgradeButton = game.addChild(new UpgradeButton());
+upgradeButton.x = 2048 - upgradeButton.width / 2;
+upgradeButton.y = upgradeButton.height / 2;
 // Update score function
 function updateScore() {
-	score += 1;
+	score += scoreMultiplier;
 	scoreTxt.setText(score);
 }
 // Handle button press
 button.down = function (x, y, obj) {
@@ -74,5 +88,14 @@
 };
 // Game update function
 game.update = function () {
 	// No specific update logic for the game
+};
+// Handle upgrade button press
+upgradeButton.down = function (x, y, obj) {
+	// Increase the score multiplier when the upgrade button is clicked
+	scoreMultiplier += 1;
+	// Flash the button to give feedback
+	LK.effects.flashObject(upgradeButton, 0xff0000, 100);
+	// Play a sound when the button is clicked
+	LK.getSound('clicksound').play();
 };
\ No newline at end of file