I like exploring this ocean so much !
I was first thinking that I will be done after few secondes but then I discovered that my environnement was changing and then I kept beeing curious about what I was going to see.
I like the variety of creatures you can find and the effort you put on the overall atmosphere (audio, sfx, bubbles, shark...), It really makes me believe in this experience.
the oxygen and battery mecanics are very repetitive but given the time you had to do that I'm very curious to know what you would have done with more time.
Other than that I loved that you can then have a look at your gallery to see your shot.
I've been playing until 1306 (meters ?) and I've found 10 creatures (may have some double)
Congrats !