cool art and character design. The girl is cute and has personality.
The gore is nice and shooting feels nice and responsive.
the demo is brutal right now with a single life but it's understandable as a demo. I have no idea how the final game will play out, but I hope you will get rid of the diablo style quicksave/quickload. It's way too convenient and incourages savescumming and bad game balance.
One of my biggest concerns for the final game is repetitive content, which I think was my biggest issue with Tower of K. The enviroments are somehow even more depressing and brutalist than Tower of K, which may get get old quickly and harm the experience. I have some issues navigating the levels, but obviously its expected without a minimap in a game designed around having one.
Another thing, you should (also?) add the demo controls and notes directly in the main menu rather than having a separate V button. It should be cleaner and avoid any confusion.