This is a really playful style for the map. I can see a lot of fairy tale adventures happening there.
The trees looked a little odd to me, the seem to float above the map. I am not very familiar with CC2 but if the trees are on a separate layer you might try blurring them a little. I am not sure this would cure it but the eye tends to assume the sharper focused items are closer.
To my eye the color changes seem abrupt, especially the forest to the desert. I would have some green between between the forest and the desert and the lightly forested area around the mountains just a little more background green.
Even with no changes its a beautiful map.