I love shooters, so you had me hooked from the moment you put a gun in your cover image. The art and sound design are great and do what they set out to do very well.
Minor nitpicks. Enemies spawned right next to me and shot me more than once, sometimes with automatic weapons. That didn't feel good. Also, some of the UI elements got in the way of the action at times, making it so I couldn't see enemies. I like how all of the UI looks, it's just a bit bulky at times. I like enemy statuses changing. The game has a lot of personality.
Overall, I played a few times and had fun. Great job :)