Man, I just love this The simplicity and yet it drives your fantasy wondering what’s happening with theese two characters. I think you should try to bring some more saturation into you’r colors however. Especially on the background (sky), have you thought of having a clear dark blue night with a moon that shines and some mysterious clouds? You could bring in a lantern or something above the characters on you’r cottage to the right. And get some nice contrast aswell from the gold glowing in the dark.
Just an idea! Hope it helps!