Sorry, but once again I will have to say that this is... Well.. Terrible =/
- Squares, here there and everywhere
- To many groundtypes (well, if all of them were used in extremely small areas (mostly on the sides~) and then one big floor type covering the floor it COULD look good with many different grounds) - Depending on how you would use them then.
- Void? And that much of it?
.. Do what u want with that.. but It doesn't exactly look good to use huge amounts of it.
<Places I could think of using it: Special Portal of some sort / or when you die, you could spawn on a small path/in a house (w/e) surrounded by void, meaning you are dead and have to be revived> Else I can't think of anything really... Good for the void.
Another thing:
- It's way to... Big../Open, I would recommend making it a bit more narrow, because who knows how big that area actually is? All we can see is a small part of it.
I would suggest you take a pretty in depth look on lots of tutorials and THEN start mapping for a project
All I can say is that this looks like the usual 7.1-7.6 mapping people used to do, completely random, squared and without detailed areas :<
Oh well, good luck to you, I hope you can understand that I'm posting this to help you and not to completely rack down on you or smth.