Wow, this is a great game! It has a really great aesthetic, it is a lot of fun, and the theme is incorporated well through the level. The controls are very easy to pick up and it's satisfying moving and dashing around. The art is great, I love the eldritch/body horror theme!
I also enjoyed the levelling system a lot, gives you a lot of options and builds and I could see it expanded even further. For now I tried some glass cannon builds (less life, more damage/bullet size/bullet ricochet), some "shielding" ones (less life, maxed deflection tree), and some hybrid ones. In general I noticed more "speedy" builds tend to do better for me, as my main way of dying was being crushed by the arena (which is very interesting, but sometimes I noticed it was a bit bugged as some of the times I died I was just chilling on a spinning block).
The story is also very intriguing, and I'm surprised by the amount of stuff there is in the game! I admit I couldn't beat the clock boss (as already said, I got crushed multiple times by the arena), but maybe I'll go for a rematch later.
Only criticism I have, I fell like boss movement and shooting is a bit too random and could feel unfair at times, also i didn't get how the clock boss worked (I had to damage the numbers, but why and what happened when I didn't? Maybe a bit more feedback was needed).