Well, I have quite a number of things to comment on that map (cause I have microscopic vision XD )
1. You waste too much map space only with emptiness or trees, if Nintendo were to do that they wouldn't use cartridges but DVDs or something like that.
2. As Claire said, coastal means beach, etc,etc,etc + that boat is a little big to be on a river?
3. Those bridges are scary, in case you didn't notice there's better tiles to use as a support for the bridge.
4. You don't use layers correctly, some trees are missing their sides, others missing the tops, and you could just use the tileset in a better way for those poor trees.
5. That tileset has more than one type of rock, not using so many rocks that look the same and in a symmetrical way would be good.
6. Nature is random, almost everything in your map seems to be symmetrical like someone actually projected for it to be like that, make things more random that will solve some problems.
7. There's so many types of houses,etc on that tileset and even though you always restrict yourself to 1 or 2 types of houses... try to give some use to that tileset, be creative and use layers wisely :\