awesome!
1. during main menu, I also think that the text is abit unappealing, a little bit hard to read. How bout some text colour, font style or size. like Midday - white colour - nightmare - red colour
2. sometimes the demon moves / teleport / rotate quite robotically, if you could improve the movement to make it much smoother will be much greater too
3. for single player, do u have story mode available? If you don't have, I can show you what I have in mind.