Nice take on the theme! I admit it took a while for me to wrap my head around this one. I want to see how this would play once you finish implementing all the features. Right now it's kind of laking. Something that annoys me is the fact you have to click and hold to increment how much coal you want to ship and sell, and it increments waaaaaay too slowly. Basically, I have to spend the entire game just click-holding on 2 buttons, and it made the rest of the game, all the strategy of picking which ports to sell to etc, basically irrelevant. My suggestion is to add a "add 10,100,1k" button. In general, that part needs to require way fewer clicks for the game to be playable imo. Other than that, the UI work is really well done, really responsive and good-looking, and I really like the portraits of the characters!