I like the color scheme, and the layout of the map. Nice job. One suggestion though: if you're not using a crisp background image--better if you can, but if you don't have one--you might try reducing the opacity on the pen drawing layer, duplicate it, then go to Filters > Blur > Lens Blur and add a tiny bit of blur to that duplicated layer so that it better matches and melds with the background. Just a tiny detail thing. It is better if you can use a crisp background.