Supper cool project! I really like the theme and setting! 

A few notes, which I home will be useful: 

1. The feedback that your weapon is about to be overheated is not readable. It is very hard to see red glow FX.  
2. I didn't get what minions really do. I summon a few of them and they didn't do anything.
3. I didn't play a lot but I couldn't see gameplay differences between green ammo and yellow ammo in the gameplay point of view.  It seems that they have the same effect and the same hit feedback. 
4. It is just a bug, but I was able to hit enemy on the other side of the fence by melee attack.