I really really appreciate the in depth feedback, thank you!
I think you're totally right about the camera. It wasn't till I uploaded a prototype build and someone left a comment that I found out the camera was nausea-inducing, so the accessibility settings were a very last-minute thing. I think what you described for a camera system would work really well, I might upload a build with that in the future.
As for the gameplay structure, I don't think I gave it the thought it deserves, it was basically just an implementation of the first thing I thought of. Having the structure separated out by requiring a base score I think would be a fair improvement.
And apologies for the flashbang!