===================================================================
--- original.js
+++ change.js
@@ -7,8 +7,9 @@
 var Hero = Container.expand(function () {
 	var self = Container.call(this);
 	var heroGraphics = self.createAsset('hero', 'Hero Graphics', .5, .5);
 	self.shoot = function () {};
+	self.update = function () {};
 });
 var Enemy = Container.expand(function () {
 	var self = Container.call(this);
 	var enemyGraphics = self.createAsset('enemy', 'Enemy Graphics', .5, .5);