I like that you've combined brushes to make bigger brushes. I hoped that would happen (that's all I've done to make the city icons that I've done so far so there's nothing to stop other doing the same if they require cities.)
I'm not wildly in love with your colouring on that city though, just a few bright colours that stand out too much. But then I didn't like the yellow conical roof on the castle you put in but I guess that is growing on me now. Hehe.

My favourite part of your map so far though? Your swamp. I think that looks amazing.