I developed the fantasy landscape so that the castle is more obvious. I've also altered the lighting so it's a little more varied, however I still can't seem to get the shadows quite right. I think my light isn't placed in the correct place, so the shadows fall slightly awkwardly onto the scene. I also think I need to make them blend in a bit more neatly so that they aren't as dark and defined, as they looks like the sort of shadows you might get from an indoor spotlight.
As I've mentioned, if I have some time left after completing the animation then I will look into adding UV textures onto the models so that they're more interesting and stylised.