I like the contrast of light and shadows. That's what attracted me for viewing this picture. The trees and little flying things are beautiful. But I think a bit more work could have been added to the man with the sword. In my view he is a bit to simple or plain for the beautiful surroundings. He has no face and that in my humble opinion does not fit to the details of the background.
The trees with all their worked out leafs in the top and falling down are so beautiful!
The trees far behind in the center of the picture seem very clean and straight. If thats what you wanted its fine by me. I think this is a beautyfull painting. Pure Mystery
The man with the sword could be faceless for the following reason:
He is meant to 'link' the player to the game. Thats also why he is called Link, and does not have a voice. If they were to gave him a voice, that would destroy the band between the player and the game.
So because of that, the artist may have choosen to leave him faceless, so that we could link our own faces to him.
That being said, I'm not the artist of this masterpiece, so I could be completely wrong, but this is the reason I believe he is faceless.