This game was a fun experience.
The upgrade system added so much for me. Also the Idea of buying your HP at the start of every trial was realy fun. Visuals are amazing and I love the setting you choose. Combat is very difficult and I think it would help a lot, if there would be a startup animation that is relatable ^^.
I figured out that you can stand ontop of the enemy. This helped me out a lot and made fighting a lot more complex.
Overall a very good game.