At first I rated this game a 3 star. The more I play it the worse it gets. Most of the time I can't get the boost because it says add not available. The same thing happens with the extra $2. It says available but won't let me watch an add. You don't make money when the app is off unless you have the boost on. So that means they are limiting your progress in the game. This game could be great but it is falling flat.