i really like this map. it's fresh clean and crisp. also the colour palette is very well chosen.
however i have 2 minor nitpicks. as far as i'm concerned you can ignore both as it's something most people will not even notice, but if you feel like solving them and it doesn't take long then it will all look just a tad closer to perfection.
1. river-sea blending. right now the river ends abruptly as it hits the sea:
i believe it should be a smooth transition like so:
2. border pressure points. in some areas you have pressure points in the borders where it appears like there's a thicker blacker spot. if you used a stylus to draw them, then you must have had the pressure option turned on. if you drew them by mouse then you probably didn't have a smooth move in that area and hence it registered a thicker spot.
“In the beginning God said, the four-dimensional divergence of an antisymmetric, second rank tensor equals zero, and there was light, and it was good. And on the seventh day he rested.”- Michio Kaku