Got all the achievements, and the counters to overflow before I realized that this is the win condition. :D
Very straightforward to play and nice visuals. Currently you can buy all / sell all after memorizing some price ranges. While playing, I was always expecting to meet some constraints, a turn counter, or the time to run out. Limits on stock, storage, and resources would make the management aspect more interesting, e.g. if you have to feed your crew every time you sail to a new port, or there is a risk of mishaps on the high sea.