If you are going for a realistic touch of a map, I would add some more sub-rivers to the existing ones. If this is a map over the whole world, and if the size of the planet is similar to earth, then the mountains may be too huge or beveled.
Overall, I like the colors, and the texture on the ground and forest are nice. Maybe to much depth on the forests though.

But this is my personal ramble of course. It's always hard to judge the work of others, because nothing is right or wrong.