Nice game! Core gameplay loop works well, interesting idea that every upgrade brings a debuff with it. Reminded me of Curse of the dead gods.
I think the camera should be more in the center of the character, because it was sometimes hard to see enemies on the lower border.
Also sometimes red skulls would spawn directly at my position and deal damage.
But the core of the game works very well. Very entertaining and fun to play. I played until Level 97 and then the enemies stopped spawning.