A solid entry! Especially for a single dev.
There's not little content here, and I love that.

I like how there's not one way to traverse this place, but going to some places doesn't feel rewarding at all. It's implied you can get upwards at times, but sometimes you can't.

The grappling hook is quite messy, but I still enjoyed using it, especially to get further when you become slow.

I'd have put more effort into the enemies.

I love the idea of the campfires, but I think it drags on for a bit too long, or that there should be a more clear indicator of how much time's left. Not a fan of how the camera zooms in a lot - at first I thought it was a bug.

The sound sounds sound! haha
The ending song was lovely, the the SFX were overall aight. The campfire sound was way too loud though.

And the little bits of writing were nice! Even though the story was not heavy, this addition was meaningful.

Great job :D