Nice, while I could not test the multiplayer part I do like the overall aesthetics and it runs really smooth. A bit more feedback if a target was hit would be nice, and then some progression in the gameplay. And some muted background ambience / music / ominous drones from machinery could help with immersion. 

It's very possible I just don't get it, but there doesn't seem to be a lot of game here. That said, I really like what I see, and I want more from it. It runs smooth and has great atmosphere. There's an NES game called Gradius, it has a very simple weapons upgrade system that I think would fit this game. The enemies look great! I hope we get updates to this. Thanks!

I will leave a comment here, so I can find it again more easily