Not a bad effort, the mountains look really good, but the forests are a little too unaturaly green for my liking, and the forest to the top left of the map has a really curved and conformed treeline instead of something more broken up.

The biggest problem with them map is your rivers (don't worry, this is the same for most people) for a number of reasons:

1) Style. They look like they're sat on top of the map instead of being part of it due to no effects being added and being one conformed colour.
2) Shape. They're way too perfect ad curved, they should be a little more jagged.
3) Symmetry. They have the same thickness throughout, they should be narrow in the mountains where they start (rivers always start in highland), and thicker when they reach the ocean.
4) Technical. Rivers don't just suddenly break into a fork, you only find a fork where two rivers merge into one (and the river becomes wider). There only a few rare instances where a river will fork into a new river.

Good job though