The game is cool, keep at it, it's more interesting than most generic boring games. As for the lockups. Nothing in particular, I'll be playing for a while and you just get to any ordinary screen and it will freeze up without any warning. The longer the game is running the more likely it will freeze up at some point. Sometimes it seems to happen like if I am playing the game but if I click off to do something else on the computer then come back to it.