var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.createAsset('enemy', 'Enemy character', .5, .5);
	self.choice = null;
	self.color = 0xff0000;
	self.choose = function () {
		var choices = ['scissors', 'stone', 'paper'];
		self.choice = choices[Math.floor(Math.random() * choices.length)];
	};
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.createAsset('player', 'Player character', .5, .5);
	self.choice = null;
	self.color = 0x00ff00;
	self.choose = function (choice) {
		self.choice = choice;
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	self.playerScore = 0;
	self.enemyScore = 0;
	var enemy = self.addChild(new Enemy());
	var player = self.addChild(new Player());
	var resultTxt = new Text2('', {
		size: 150,
		fill: "#ffffff"
	});
	resultTxt.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(resultTxt);
	var playerScoreTxt = new Text2('Player Score: 0', {
		size: 100,
		fill: "#ffffff"
	});
	playerScoreTxt.anchor.set(0, 1);
	LK.gui.bottomLeft.addChild(playerScoreTxt);
	var enemyScoreTxt = new Text2('Enemy Score: 0', {
		size: 100,
		fill: "#ffffff"
	});
	enemyScoreTxt.anchor.set(1, 1);
	LK.gui.bottomRight.addChild(enemyScoreTxt);
	enemy.x = 2048 / 2 - 200;
	enemy.y = 2732 / 2;
	player.x = 2048 / 2 + 200;
	player.y = 2732 / 2;
	var choices = ['scissors', 'stone', 'paper'];
	choices.forEach(function (choice, index) {
		var choiceBtn = LK.getAsset(choice, 'Choice button', .5, .5);
		choiceBtn.x = 2048 / 3 * index + 2048 / 6;
		choiceBtn.y = 2732 - 200;
		self.addChild(choiceBtn);
		choiceBtn.on('down', function () {
			player.choose(choice);
			enemy.choose();
			var result = '';
			if (player.choice === enemy.choice) {
				result = 'Draw!';
			} else if (player.choice === 'scissors' && enemy.choice === 'paper' || player.choice === 'stone' && enemy.choice === 'scissors' || player.choice === 'paper' && enemy.choice === 'stone') {
				result = 'You win!';
				self.playerScore++;
				choiceBtn.tint = player.color;
			} else {
				result = 'You lose!';
				self.enemyScore++;
				choiceBtn.tint = enemy.color;
			}
			resultTxt.setText(result);
			playerScoreTxt.setText('Player Score: ' + self.playerScore);
			enemyScoreTxt.setText('Enemy Score: ' + self.enemyScore);
		});
	});
});

===================================================================
--- original.js
+++ change.js
@@ -1,8 +1,9 @@
 var Enemy = Container.expand(function () {
 	var self = Container.call(this);
 	var enemyGraphics = self.createAsset('enemy', 'Enemy character', .5, .5);
 	self.choice = null;
+	self.color = 0xff0000;
 	self.choose = function () {
 		var choices = ['scissors', 'stone', 'paper'];
 		self.choice = choices[Math.floor(Math.random() * choices.length)];
 	};
@@ -10,8 +11,9 @@
 var Player = Container.expand(function () {
 	var self = Container.call(this);
 	var playerGraphics = self.createAsset('player', 'Player character', .5, .5);
 	self.choice = null;
+	self.color = 0x00ff00;
 	self.choose = function (choice) {
 		self.choice = choice;
 	};
 });
@@ -57,11 +59,13 @@
 				result = 'Draw!';
 			} else if (player.choice === 'scissors' && enemy.choice === 'paper' || player.choice === 'stone' && enemy.choice === 'scissors' || player.choice === 'paper' && enemy.choice === 'stone') {
 				result = 'You win!';
 				self.playerScore++;
+				choiceBtn.tint = player.color;
 			} else {
 				result = 'You lose!';
 				self.enemyScore++;
+				choiceBtn.tint = enemy.color;
 			}
 			resultTxt.setText(result);
 			playerScoreTxt.setText('Player Score: ' + self.playerScore);
 			enemyScoreTxt.setText('Enemy Score: ' + self.enemyScore);