Moody and atmospheric spelunking. Nice controls, I like them (I would change scaling to mouse wheel, though, feels more natural - my personal thought)
The instant-end bug happened twice to me, and I get to play on my 3rd attempt, by rapidly getting away from the campfire - there is probably a trigger issue there...
The cave environment felt a little too repetitive, even for a cave environment. Some color variation at the very least would've been nice & help us find our way a little (And maybe a map interface, somewhere..?) The overall atmosphere is otherwise great, and the way it gets claustrophobical when you zoom in was really cool :)
Congrats on your submission!