Hi , your chapters are short because you wrote pure story and dialogue. Jake's uncle came and gone , we only knew that he talked to jake with sweet(may be sickly) voice. How he looks , his or other characters body structures, what's they wearing, how the castle was built, is there any garden, stable , and many more details to lengthening the story would give us visual imagination of story. Sorry if you don't like because I am only a reader not an author.