Oh, thats dark..
Well done! Especially for Your first game.
I discovered two different endings, but the third remains unknown to me. It's fine though, I like a sense of mystery. The style fits together very well with the games focus on exploration. Its ambience is hypnotic and strangely makes me think of the game "Zork". It gives a very similar vibe actually, but nevertheless, it's very original. Aside from the nature sounds, there could be more audio effects and the weird squishing maybe replaced with something more abrupt, but also not startling. Graphics could definitely be improved, but it's not a necessity, because it already has a certain charm to it. One thing, that I don't like is the text being stuck to the ground and influenced by the lighting. Shouldn't be hard to fix.
Overall, the experience was whole and unique and I'd love to have some more!
Keep it coming. :)