Alright, but I have the same problem as Paladin. Basically, ON THE LAST LEVEL, THAT ****ING CEILING ISN'T DEEP ENOUGH FOR THE ARROW TO POINT IN THE RIGHT DIRECTION! Other than that, very good game, well thought through.
Oh dear, i seem to have become so depressed playing this game that i deliberately gave my life to the neverending swarms of identical crap. Go repetitive strain injury.