This is overall a REALLY cool game. Only thing is, I'm not very good at aiming, and the healing orbs were pretty hard to hit, but that might just be me.
On another note, the gun sound could be improved, everything else about the game feels and sounds powerful, but then it just sounds like a paintball gun. Additionally, the game could have leaned more into fast melee attacks, like the first boss, when he pulled out a sword, it was really fun and entertaining dodging all of those orbs and keeping him at bay. However the second boss FELT like a pretty good boss and I see what the intent was, but there was too much emphasis on the orbs, especially the chasers. It IS in fact really epic that the tentacle guy spits up this huge attack, but after the first time it gets a bit more annoying than terrifying.
Overall, AWESOME game, needs some improvements, but with some elbow grease, I'd say it could be steam-worthy