You're how I found out about this jam! I played Shadow Block earlier and liked your Facebook page, then got notification of this jam by your page. So, thanks! Anyway, your game. I like how you basically have a regular gun, a shotgun, and a chain gun in one convenient package. However, the enemies are so tiny that's it a chore to land any of your dinky shots on them. So, I'd make the enemies larger. I also really like the music for this one too.
If you would like to see my submission, please check out Napalm Town: https://itch.io/jam/gmtk-jam/rate/159296