This game is awesome! Really simple shapes but executed well. Clever use of ammo being your shield. Cool idea that I think is well done here.I think there's a ton you can do with this game! Great music and good SFX. Loved the look of the nucleus. Everything is so bright and I love the simple flat stage with the particley skybox! I think the enemies could use some sound. Or something. They kept sneaking up on me.
I think your shop could use some more variety to it and juice when picking upgrades in general. Think there's potential here!
Loved it! Well done!