This one was pretty creepy, perhaps more so for me because I spent the Covid-19 days watching cave rescue videos! I enjoyed the concept and the art was unsettling, especially the gruesome scene of the guy and the monster. The atmosphere was pretty good, too. I liked the cold blue tone everything had, and the lighting was pretty solid, too. The game actually started feeling tense, with the platforming and the strange discoveries you find throughout the cave get you psychologically and linger in your mind. Touche, my friend! Overall pretty balanced, too.
Some suggestions for you if you were to continue with this project: I would consider adding an oxygen meter to sort of make the player pushed into pressing forward, might add some anxiety. Plus, it would be cool to have a death animation of running out of oxygen. It would also be really cool to have different paths with different scenes/scares, etc. So you could have different endings and some replayability.
I was having issues running your game at first (I was using Linux and I was getting crashing at first, but I figured it out!) Though, I meant to play this one sooner because it looked nifty!
Oh, and looks like you might forgot to add some collision to this section! hehe
