I like the take of the theme and the fact you need to click to shoot. It is kinda like a hidden clicker game haha.
Some notes I wrote while playing:
- Sometimes I get powerups that are the same but better in the same upgrade screen (+20 HP, +40 HP)
- Could be neat to have more upgrade vectors or every X rounds you get to choose a special upgrade. (Like twin bullets, or some HP regen)