I enjoyed the game a lot, but unfortunatelly I don't think I've completely grassped the theme of the spreading. I didn't realize the red parts of the cave was supposed to be the flesh until I've read the documentation.
Since the cave have most likely been visited before by other human beings, I would've appreciated some sorts of other light sources spreaded across the cave, not only for better visibility, but also as a better idea of where the checkpoints are, because no matter where I died, it seemed to just boot me up back again to the start of the cave.
On the other hand, the idea is intriguing, I like it and I think it can still be worked on given a bit more time. I hope the devs have enjoyed their time making this game and I wish them nothing but the best in the future!