Oh wow, the detail! This looks fantastic, and you can just feel the hours and sweat that went into it.

The only critique I have is that the coastline-sea border looks too ... um, too. I'm not sure exactly what it is that's bothering me. If it was my map I'd start by shrinking the blue line and maybe putting a gradient in place of the thick blue line, but I'm ALL trial and error -- I have no idea if that would fix the problem. Of course, if you look at it and think I'm nuts, there is no problem in the first place

Upon thinking more, I can see the boardgame-thick border thing, in which case I'm wondering why nothing else has the thick border. Ah well, hopefully that gives you some food for thought anyway.