This piece is stunning! I love the seamlessness of how you manipulated everything, and the peaceful overall feeling of it. If i could change one thing it would be the height of the person relative to the height of the castle/tower. I know you had to have the person that size so you could see them from this distance, but if you look at the tower as well the person would seem rather gigantic trying to duck through those doorways, my advice would be to make the castle a smidge bigger :> Other than that i LOVE how you did the background with the shooting stars and the circle of clouds to guide the eye closer to the center of the picture! Overall VERY VERY well done!
I will for sure be looking at your other photo manipulations!