Really satisfying and cool game! Very easy to pick up, and I can imagine can get quite difficult and complicated with upgrades and levels and different enemies. I felt quite strong and the player is really fast, so I did not think it was very challenging (at least not yet, I played about 15-20 min). Maybe you prefer it like this to have it be more arcade-y, and a bit like Vampire Survivors in terms of ramping up difficulty and choosing upgrades? Good luck with the project!