Very interesting concept, though not my kind of playstyle, I have played it longer than I expected.
Its definitely the kind of game that you need to take time to understand what's happening before you know what you're doing, something which I actually admire when developers do so and not mention every detail the game would have.
Something I'd want in the game though if you could: would want the routes to passively show how many ships there are on that route, I find it slightly irritating that I have to look at every route to make sure it has max number of ships in it.
Whether or not that would be strategically smart, I wouldn't know but very impressive considering its solo developed, well done!