A few comments:
- Mountains are way too repetitive in my opinion and doesn't really feet the forests (simple but nicely suggested )
- Using drop shadow on coastlines and forests make them looks like floating.
- Some rivers issues : Rivers flow down on the shortest way to the sea so I think the one on north western mountains should go west rather than south and the one in the north should go south rather than east. Also River sources are a bit obvious and harsh.

I like the landshape and the coastlines