Thanks for playing!
The Vamp Survivors/Bullet Hell elements just kind of arose from the time limit, adding more projectiles enemies was a fast way to provide more variety to the relatively simple combat system. The combat definitely needs a lot of tuning and polish and the level structure and boss fight need to be redone, the boss basically just repurposes elements of the two ranged enemy types, but I wanted to have something at the end to make it feel like a more complete experience. Going forward I'm not sure if we'll keep the linear style level structure or if we'll switch to something more like an arena or maybe we'll keep both and split it into a story mode and endless mode.