I like the idea, but I'm not sure I really understand the gravity of the situation here... seems like movement is based more upon invisible paths than upon physics? The first few levels were alright, but I feel like the name's a bit misleading, and the difficulty really skyrockets with the 'evil' one. Is there some simple trick I'm missing there, maybe?
Also would be nice if the level numbers were noted too. A little more polish: this could be pretty good! Entertaining random messages when you run into Bob too.
-cd-