Thanks a lot for the feedback.
I like the vignette idea, will look into that. There actually is a subtle screenshake when you get hit but I guess it's too subtle...
The blue enemies used to be very weak before I added pathfinding (they would just keep shooting into a wall), which I did on the last day so I didn't have much time to playtest, I totaly agree I should lower their range. A deflect feature is a cool idea, I'll think about it