UPDATE: I've uninstalled it. The audio hijacking of other apps (I'll be listening to a book and suddenly the stupid song from the ad takes over) is intrusive and unacceptable. There needs to be a purchased, ad free version. Fun to play. There is no option to undo an action. The ads hijack my audio when I'm listening to books or what not. Ads should be silent if you have audio on the game turned off. This is the reason for only two stars.