That was an experience.
I like the creepy vibe of humans as trees, with no real explanation. But I did want *some* answers, some pieces of (environmental) storytelling. Why am I collecting flesh? Do I do anything with it, do I need a certain amount? Do I have a specific goal at all? I also think if you should want to keep working on this, there's more horror elements you could add; do the human trees ever move, come alive, take revenge?
Camera moved a bit slow for my liking. Really had to drag the mouse quite a bit to rotate myself.
All in all, a fun creepy environment, with room for more storytelling.