I like your concept based on the theme a lot and i think the potential is there but I think the implementation holds it back. The game is rather buggy and I found it hard to play because of it. Two major bugs were where I would fall through the floor when spawning and not being able to move after spawning at a new checkpoint. I was also able to die when already dead.
I think the movement could be more responsive too, it felt too sluggish when changing directions.
Despite this, I liked the art you had and again the concept is strong. Good job!