I love the aesthetic you've got going, I really like your forest sketch and what you've got going with the edits. (I like your sketch a lil better but that's a matter or personal taste, also I don't know how each would feel in context.)
Your caretaker design is really great! I like your sketches of it a lot because it seems definitively eerie and nonhuman, but also kinda sweet and friendly. I don't think that's the vibe you're going for pfft but I think it's really cute all the same. Kinda reminds me of Terry Pratchett's Death. The other drawing of it definitely has more of a creepy vibe.
I'm really looking forward to seeing how it develops! In the meantime, I'm listening to the album it's inspired by.