Continuity mistake: At the Amateur Magicians Contest, the first shot of the walk where Zelda sits in her throne shows a wooden piece stretching down from a balcony above the door to the top of the door. There are also windows to the left and right of her with a plant in them. A couple minutes later when Link looks out the window of his tower to see the dragon attacking Zelda, the wooden piece and the windows have vanished. The bricks of the wall also become fewer but bigger. As well as Zelda's stairs become shorter.
Picture added by Quantom X