I like the idea, but sometimes brushing against a wall brings me an immediate game-over. This shouldn't happen, right? The movement is grid-based, but the collision detection isn't?
EDIT: Grammar. "The movement is be grid-based..."
Did it happen often? I didn't face this problem while testing, hmm. Maybe it was due to running out of pieces of paper? I wanted to make the visual feedback of what actually kills the character more intuitive, but didn't have time for that.
I will look into it anyways, maybe there is a problem with collision as you mentioned. Huge thank you for pointing that out, and for playing too! I will fix it if this is the case