I'm not sure why the game is so choppy and jittery, as the graphics are not anything that would tax my iPhone 4. There seems to be some issues with frame rate, as even with three clouds and a soul, the game looses all smoothness. Other than the frame rate, the other issue is that the gameplay is just not that fun, particularly the classic mode where the first five minutes consist of touching white souls while avoiding black souls at a rate of about one per 5 seconds. I'm not sure what's supposed to be fun or challenging about that. The arcade mode is a little more action packed, but because of the frame rate and lack of challenge, isn't much fun either. The game gets two stars though, one for effort and another got being free. It's free, so try it for yourself... maybe I've got it backwards, maybe I'm just trying to play an Atari game on a supercomputer.