The visual art seemed really good ! The light effects are awesome, and the way the cameras are used to show the bosses and the environment is really great. Also, the fact that the bosses had a small introduction before the fight was really cool, great work.
The esoteric concept with the transmutation circles? (I'm not sure if that's how it's called?) was very interesting.
The second boss was quite hard to beat, in fact, I was trying for several minutes xD I even took a screenshot when I finally beat it xD have a good day!