Nice! I really like the 'feel' of the map: the colours, lines, and fonts use all seem to mesh really well and it looks like a coherent map. I do agree with vorropohaiah that a different choice of font for the 'subtitle might be better. One other thing that stands out to me is that the railway lines are really similar to the national borders, while I'd expect them to be visually closer to airship routes.

Great work!