Very fun game!
I liked the fast paced action, the way you made the jam theme the core of the upgrade system and just how engaging the combat is!
Clean and simple sprites, which made the action stand out even more. Nice variety of enemies, each with their own type of attack pattern and projectile.
Cool music that fits the game and nice sound effects.
The only downside is that the game ended after I got all upgrades and died. XD
Great game!