At first I have to say your picture is awesome O.o
But now to the facts: You really make me feel the distance in this picture with the castle in the back and the trees which are fading away more and more. Furthermore the stucture of the foreground in very detailed, especially the flowers, the grass and the trees and the colours you chose are in perfect harmony with the theme of your picture. Now to the unicorn. It has the right anatomy and it makes the picture moving because of the tail.^^ I the landscape seems a little bit could, but also like a paradies everyone wants to visit. And with the unicorn it has a touch of magic. One only thing I could decry is the pink light. I think it's a little bit too bright and striking.
At the end you did your work very very well EPIC!!!
This vision sure does set the mood to believe in magic and freedom in some faraway land Plus, I like the canopy effect you got going, the way you've "stacked" trees on top of trees and have the landscape reaching above the viewer
It seems imaginative, but it fades too fast in the distance, particularly in the forest road. I can tell it's far, but those pine trees are at the same distance as the trees on the other side of the road.
It's not easily noticeable, but thinking about it, I think you faded too much of your work, just to make me concentrate in the unicorn, which isn't bad at all, though it feels off.