Thanks for the input. I'll change a few things on it to make it even safer to hide in my fortress. I think I'm going to add doors to my plans and put heavy doors in the arcades. I think the basic design is pretty good so far. I think I'm going to leave the style as it is to make it look like a castle from a civiliation that is just starting to build stone fortifications.

The race this castle was built by is one of the races in my world I haven't really developed yet. I think they may develop in a way that makes them similar to Tolkein's dwarves. I should try to figure out how to render underground structures with the style I'm using to draft my ideas. I might render this castle on paper and add much more, but I do have a lot of projects in the works for my main race the Rokat in which my city maps are for.