Really enjoyable experience! Great use of grapple mechanics (our game uses a grapple too haha) and theme. By the time I got all the upgrades and found Alice I had forgot I was looking for her and thought it was a random dead diver! Was relieved to find out it was Alice. The dynamic fish swimming system was really well done.
My only critiques are very minor things: It would be nice to have a larger/more open environment with resources scattered around a bit more and O2 depleting slower. I really liked the swimming and wanted to take in the scenery but felt too rushed to enjoy it. Other than that, maybe having the resource gather button mapped to a keyboard button instead of left mouse, because once I got the grapple I found myself wanting to gather things after grappling and getting a little mixed up.