This is really nice man! I liked the way the flags moves with the wind. Are you using cloth simulation? Pretty neat!
The way the environment is set up is really immersive. If you ever want to make an executable file for a simple walkthrough I could help you making the file 
One thing though, the towers could use more extra geo so that they don’t look that polygonal, I know that this is not final but keep this in mind if you want to refine some of your assets
Keep the great work !