Tried the game after get it from itch. I took full version mainly to see how much art is done, and can say that there is barely any in chapters for now. Any plan for even AI arts being a placeholder till your contracted artist get to the pace, I mean, I think that even chapter 1 does not have complete art and you are on chapter 8 for now.
Still, story is great even if I am not liking the combat, most probably it will take some time to adept to it. Only a few games have demon based female protag corruption nowadays, glad to see a good one here.
And from what I played, demonic transformation indeed can be suitable here if player gets high corruption.