The mountains/terrain and colors are excellent; the only things I'm not digging are the rivers and the waves. For the rivers, they look a bit wide for a continental scale, especially with the stroke and bevel around them. Also, the terminus where the meet the sea is very abrupt because of the heavy black outline around the landmass. For the waves, I'd dump them altogether. They draw too much of the focus away from the land and seem out of place.

edit: I also see a river violation in the west - it looks like you've got a river splitting around that long peninsula on the left.