If you don't mind, I'm only going to comment on the castle itself. The exterior certainly doesn't look too bad at all, and the effort put into the outside hill shows to quite some extent, though the path leading to the castle entrance looks tacked on. The interior however could use some work. Some areas(Like the crate room.) look filled with props while others(Such as the throne room.) look too empty, judging by the screenshots. Certain props look out of place, like the guard rails, red carpet and black floor. use of strong primary colours in contrast with the surrounding white and light grays is displeasing to the eye.
And realistically, for a castle, having that ramped roof going from it's side to the very top is a very bad idea.