Very atmospheric and the idea of passing on a flame is cool! I also liked how the spirits got smaller and smaller though I'm not sure if they ever eventually vanish? It feels like there could be really interesting lore developed from this :)
Gameplay-wise I think experienced some lag, especially after restarting after a death; I'm not sure if it's a result of too many entities in the scene? Maybe things should dynamically load in as they go on screen and get freed when they go off screen, if that's not being done already. And it felt like my jumps weren't registered sometimes on the rocks but I'm not entirely sure.
I liked the curve ball thrown in towards the end where you have the double-back to the left on one of the tree branches!