This is a cool little puzzle. I got a high score (low score?) of -80, but there was not much left of the program. Don't press space...
Do you have ideas for further levels? Presumably you want the player to keep a functioning program, right?
Wow I only just saw this and all the other comments, and yes I had some ideas where you would be stuck somewhere but could remove the collision detection code to just phase through the walls. Other than that not many ideas, but I'm open to any.
