Incredibly impressed that you made a multiplayer game! Would have been great if there was an option for bots, but with the time given this is super impressive.
The camera is a bit too tight, you might want to let cinemachine have more control over it to give it some elasticity.
Since there was no one else playing(Also I was able to name the lobby DogBollocks, so a profanity filter might be a good idea for the future). All I could do was kill the purple monsters, but killing them felt quite satisfying and the gun had a nice pew sound.