1. I understand you want to add many crawling section since it's horror game and you want MC to be helpless, but being slow and vulnerable is one thing, being a hassle to play is another. The crawling section is no fun and just grating on my nerves.
2. The underwater POV is fine but the crawling section is vertigo/motion sickness inducing. I literally feel sick after playing just for 15 minutes. I usually feel sick only after playing Soma for at least 30 minutes, usually 1 hour. Not 15 minutes.