So, due to college and work, I don't necessarily have as much time to develop this mod as I'd prefer. Currently, my ideas are to make levels based around Bubsy 3D and Bubsy 2, with midis from the original. I have no plans to reskin the demons, not right now at least, and I don't plan on adding in any weapons either.
In case you were curious, sectors over sectors are not something I care to try or implement in any way, and I plan on making the levels not involve jumping of any kind (or at least not jumping via a button), and this is because the jump height isn't especially high on GZDoom, and it makes level design a lot simpler (I would also feel obligated to work in a glide mechanic, and I don't know any Zscript, so that's not gonna happen).
If anyone has any ideas for features to add in, or just wanna offer advice, go right ahead, I don't mind. In fact, please let me know if there are any burning requests, and I'll see if I can figure out a way to implement them.