/**** 
* Classes
****/ 
var Tank = Container.expand(function () {
	var self = Container.call(this);
	var tankGraphics = self.attachAsset('tank', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		self.rotation += 0.01;
	};
});

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

/**** 
* Game Code
****/ 
// Retrieve 'place' asset and set its anchor point to the center
var placeAsset = LK.getAsset('place', {
	anchorX: 0.5,
	anchorY: 0.5
});
// Add 'place' asset to the game
game.addChild(placeAsset);
// Position 'place' asset at the center of the game
placeAsset.x = 2048 / 2;
placeAsset.y = 2732 / 2;
// Create instances of the Tank class
var tankTop = new Tank();
var tankBottom = new Tank();
// Add the tanks to the game
game.addChild(tankTop);
game.addChild(tankBottom);
// Position the tanks at the top and bottom of the game
tankTop.x = 2048 / 2;
tankTop.y = 2732 / 4;
tankBottom.x = 2048 / 2;
tankBottom.y = 2732 * 3 / 4;
game.update = function () {
	tankTop.update();
	tankBottom.update();
	if (tankTop.intersects(tankBottom)) {
		LK.effects.flashScreen(0xff0000, 1000);
		LK.showGameOver();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -42,6 +42,12 @@
 tankTop.x = 2048 / 2;
 tankTop.y = 2732 / 4;
 tankBottom.x = 2048 / 2;
 tankBottom.y = 2732 * 3 / 4;
-tankTop.update();
-tankBottom.update();
\ No newline at end of file
+game.update = function () {
+	tankTop.update();
+	tankBottom.update();
+	if (tankTop.intersects(tankBottom)) {
+		LK.effects.flashScreen(0xff0000, 1000);
+		LK.showGameOver();
+	}
+};
\ No newline at end of file