My thoughts on this game are as follows.
I love the Minigun, it's recoil is a bit much but a new custom weapon is so fun to use. Not only that the Health system you have installed also adds some difficulty to the game.
However, my main complaint is how you designed the bullets. It felt like half ot my hitting shots didn't do anything as they walked through countless amounts of lead without dying. It's only if they're in the middle they get hit.
Outside of that, this is pretty good.