Really nice environment to this game, you've done well to create that tomb-exploration feeling.
I wasn't too fond of the light going off and on, when it's pitch black I thought I'd accidentally turned it off. Perhaps fading to very low visibility (not quite pitch black) would be better.
I'm also not sure if I reached the ending properly, as the game froze after the water section?
In all, a really great jam game - well done! (and bonus points for using Godot!)