I'm olaying the android version, got a "test add" on the upper left of the screen, unable to see the usee interface there, It's been unplayable for that reason.
Ah sorry about that. My engine broke, so fixing it would essentially require to make the game from scratch again. The ad should disappear if you turn off internet while playing though. Again really sorry for that one, it has been a blemish for my game for a while.
