Its very beautiful! Absolutely love it! If youre taking any CC my only comment is that the house seems a bit large you could probably shrink it down by 2 pixels on its hight and width and still convey the house look.The base of the large tree looks odd, maybe some roots?! Lastly using dither shading on the character but not on anything else kinda makes the character look like she was dropped in from some other project. Its still super amazing, these are just some of my suggestions!
Lovely scene! Love the colours and atmosphere. Other than what was said below, I'd recommend checking the contour of the tree. If I follow down its contour diagonally across the character, part of the trunk should be visible between the legs. It's a minor detail, I didn't notice right away, but it could help improving the piece. Keep it up!