This game is super fun. I enjoy it a lot and I'd even be willing to sit through the occasional 30 second ad for it. However, the fact that those ads blast music even when my phone is in silent mode is not acceptable, as is the fact that it's a pain to exit. If you hide my phone's back button, the least you could do is put an exit button on the main menu. If you fix those two things, this would be a 4 or 5 star game. I'd also like to see something that shows all of the pieces the AI has captured.