I really enjoyed it! it's fun to play. This is the kind of game are the ones I love the most and this one has great potential. That being said, I would like to erase arrows (I found myself in a mess I couldnt fix and that was game over for me) and I would add some things:
-Load the ships with different kinds of goods
-Maybe add 4 seasons and change the value of the goods
-A bigger map and more ports
-Some ports will pay you more (or less) depending on the cargo.
-I feel that the ships are too cheap, I would make them more expensive. It would add more difficulty to the game and would add a sense of "I cant loose that ship! it would wreck my operation!".
-And I think it would be awesome if you could name the ships, I can imagine myself saying: "Little Bandit" is doing good... but i'm worried about "Unsinkable II"
(the more I write, more I feel that I should add more things and if I keep writing this could go on forever :P)
PD: love the artwork, thanks for making it!