The plan is for each layer of Hell to have a distinct visual style. I do agree the Prelude ended up being too samey and boring though, so once the rest of the game is done I might go back and redo some of it to make it a bit more interesting.
Ahh, I see! Well, I'm super excited for it, you've got something great here! Such a good mix of mechanics, it's awesome! Keep up the amazing work!