Overall I like the game. The atmosphere and ambience is executed well and when I was around 450m I really just wanted to go back up. The first jumpscare with the lights going out got me as the long waits allowed me to be deep in my thoughts.
However, I think that the final jumpscare was done too early. I don't think the tension was allowed to build up for it to pay off and when I saw it being a (relatively) normal bug/spider creature it left me more confused than anything as to how it's communicating with me with the Morse code. I'm not sure. Also, how are you attached to the cable? It seemed like I was just floating there. Oh and subtitles at the start would've been nice. I know Iron Lung doesn't have them but I think it should've as well.
What I think would work great here is to extend the length of the game and develop the story with the Morse code messages more, and perhaps change the monster design so it makes sense given the context of the game (maybe put more artifacts like that weird light thing at the start?).
Anyways, solid little horror experience, was totally immersed throughout.