I like the style, and the very saturated blue. The black level of the mountains appears to be a little darker than the trees; I think it would look better if the mountains were lightened just a little bit.

The compass rose doesn't really match the rest of the map. Also, I'm not sure about orienting the directions as you did adds anything to the map. It's confusing and doesn't convey any additional information, so I'd leave all the letters upright.

Be careful that your labels don't intersect with other lines of similar color, as that reduces legibility.

Nice work, I hope you keep at it!