I repeat the complaint others have made about the pop-up ad. Obviously everyone needs to earn revenue, but when a full-screen ad pops up right when you are about to click, and has only a tiny little 'X' to go away, that goes too far.
Then when you asked me to rate your game, and I don't put in 5 stars, & you don't go to the app store - that's another downgrade in my mind.