this is a pretty solid game
As a few others have said, I do feel like you're being ripped off in terms of score because you wanted to be paid. if 50 levels isnt enough for you, then maybe you should buy the other 58.
As for the game I've had no problems with frame rate whatsoever and the concept is fun, but I'm docking 2 stars because the controls were slippery and that just wrecks games for me.
4/5 8/10