Love the Quake vibes on graphics and the overall vibe. Firts boss looks like it's straight from Quake 1. I couldn't get past the first boss bcs it was indcredibly hard. It moves very fast and hurls boulders at you. His attacks were impossible for me to dodge and to be honest i couldn't get much fun from it. I couldn't get to see the exchange screen since i couldn't beat the first boss, so i can't really judge that. Also you don't get feedback when you hit the boss and it doesn't feel like you shoot with a shotgun.
It's a very nice looking game overall but needs a lot of work on gameplay and gamefeel.