Thanks for the full and thoughtful review.
I was overly ambitious with the scope and had to rush to remove unfinished mechanics while keeping it playable. I messed something up with my UI code, so the option menu (with sensitivity options, etc) was pulled at the last minute. This messed up my scripts to keep the mouse cursor locked and messed up the gun equipping...
I'm glad you circled back on the sound... I messed up my hearing and forgot I had audio setting on my computer to normalize loudness -- and without those, it is waaay too quiet. Needed more play testing. I might have noticed that... and I would have balanced the health a little better..
Lot's of lessons learned with the project. Again, thanks for checking it out and dropping some honest feedback.