Amazing game, super clever mechanic! Only real complaint is not having more levels :P
Loved the design on the levels, the last one is insane, made me supper happy when I completed it :)
I imagine you traced random patterns with the mouse and then drew the walls around them. Was that it or did you do them some other way?
BTW, found a small bug where you can lose after completing the level, you still progress but you get the fail sound and cross thing xP