1. I'd like to see alot more terrain build into it
2. Try transparent water with a sandy baseplate under, looks a lot much better.
3. Try to use less bricks - I see some places you could use quite a few less
4. Good job at interiors
5. Very interesting structural designs
6. Try adding some stuff on the roofs - look at some real buildings, there's usually some more stuff.
6/10. Nice job, but quite a few things could be better.