Oh wow! This is amazing. I thought it was going to flood because of the scuba gear (I called my character Scuba Man) so I kept jumping up to get to higher ground. Then this green acid started falling down so I went down the stairs and found arrows. (How did you make such a massive map? You're incredible!)
I was looking around finding some sort of background story (or additional oxygen?) when the scary-looking creatures started chasing me! I honestly thought I was screwed but when I went upstairs, the creature stopped and just ignored Scuba Man. I didn't dare to move anymore because I was scared D:
Well done! I am not very good with first-person games because I developed simulation sickness but I'm gonna give it a try again. (When I'm less scared)