I gotta say, a number of things about this game really impress me. From the artstyle down to the boss battles, it's really piqued my interest. I understand this game is in the development stage, so it will take time for more content to be added but I'm happy with the way it seems to be going.
The one thing I would recommend changing/removing is the "Doll". It gives off loli vibes (uugh I hate that term) & anything resembling a kid has no place in a game like this. If you're insistant on keeping it in then at least give it some clothes & keep it as a solely combat orientated follower/pet. Other than that, great work.