I maybe missed the answer, but do you plan to add other playable characters, i don't have anything against demon MC, but maybe for change you can experiment with the MC origin? Like fallen angel, paladin, vampire. Just for new MC, or skins, but of course you the head and the hands of the game, i as an player can only suggest interesting new details.
Also it's interesting fro gallery and new weapons, maybe even adding somewhere mentioned ability to eat enemies before slaying them, but it will take some time and definitely will give player an hard time dodging the incoming enemies.
but of course its hard even to think how to realise that in game, but we at least have the basics, so how about figuring something out from starting sheets of mechanics?
Well, I'll start of by saying thanks for playing the game and I'm happy that the application feels well optimized. I have thought about skins and costumes but that requires a lot of redrawing of animations as you can imagine there are 21 or so variants with each having 16 frames or so. So even just one extra skin adds exponential work. As for the devouring prey before they're defeated, it goes completely counter to the gameplay and I don't think it adds that much to the game for the amount of work it would require. If support continues to grow I plan on adding more weight levels first after all the basics are done and then consider skins as an additional option, but again that is not definite and if it becomes a consideration it would be a long time before I get to work on it.