It's a very good game when it does work- unfortunately, the lagging, crashing and the length of time it takes to reload the game when it crashes are absurd. I think this is mainly caused by the switching back and forth from the game to advertising. It's really a shame. You should just charge a fair price for the game and not have any ads nor in-app purchases. Or just have banners on the top and side of the screen. Such a shame that I can't enjoy this game and must uninstall...