Add: experience app timer

src/game/mouse/space_invaders/game.js

@@ -5,6 +5,11 @@ var Game = {
 
 		sessionStorageManager.setIsNewBestRecord(false);
 
+		var experienceAppTimer = new ExperienceAppTimer();
+		experienceAppTimer.setTimeOverListener(
+			(function() { this.gameOver(); }).bind(this)
+		);
+
 		// top ui
 		var screenTopUI = new ScreenTopUI();
 		screenTopUI.makeBackButton( function() {