Feedback on my build.

Work on some details. Castle walls in general are open to a lot of design. I would take the time and look up some real medieval castles and examine the architecture.

Make your structures more organic. Add interest with each building, you can play with the other kinds of blocks mix them with others and see what happens. Also, besides using single rectangular forms use combined forms even curved forms, basically maintain variety.

It looks too linear to me.
Maybe make some paths curved, and don't make box houses.

Try not to make your houses only one shape and put a roof over it. Use multiple shapes to give it a more interesting look
EX:

Try adding some detail to your keep, perhaps windows on the towers or something
Ex:

Additions that you could possibly make to your town are trees, flowers, rocks, a path from your castle doors down the hill, etc.

Ex:

Don't be afraid to venture outside of your comfort zone, practice will only make you better Anyways great job ^^

If you need some help in creating castle walls with more detail , you can pm me

Thanks for the feedback. I'll hopefully include that in my next update.

Good start. I'd say maybe more variation on the outside of the castle.