This is really good right now so I included it in my list! I won't repeat what I said in it, just things I didn't mention. The game looked fantastic and played smoothly on my crap PC, so it's very well optimized with responsive controls. Much more polished than a lot of other indie games I play at the demo stage!
Only feedback I'd give, just my preference, is not to have question marks over things that don't actually have an item hidden in them since there's a lot in the game to interact with and it's a time sink checking everything.
Also, since exploring and finding new areas is big in this, don't obscure areas the player can fall off of. Anything we can't see because it's hidden behind trees, etc., should be safe to explore instead of walking behind a bush and falling off the map. In general, it should be obvious where we can and can't go but the overall world design is really layered and I love it so far. Keep up the good work and good luck with the full game!