It's definitely a rough model haha. I really should have added human teeth to it. Big missed opportunity.
Some more references: The enemy that shoots three projectiles had their face texture sourced from a painting of inferno, the screaming faces was a reference from either inferno or purgatory, I can't remember. The hands were a reference to a description giving in purgatory, the layers idea came from purgatory, or rather the idea to make the game purgatory came from my idea for the layers.
I was really hoping to add more references though! I have a full Google doc full of things I wanted to add from the divine comedy but they didn't make it in.