Wow it's like you've made a game just for me. Seriously, outstanding work.
After a handful of games though there's a couple interface things that keep me hunting around even when just playing or just miss if I'm not paying attention to that area of the screen..
1- when placing a tile it would be super handy to have all existing buildings of the same type be highlighted. Differentiating between some electrolysis plants and other things attached to my base when looking to place something to get the adjacency bonus often means that I have to zoom way in and compare silhouettes, I'm sure it wont be a problem after another dozen games or so.. but starting out it feels like a minigame of where's waldo.
2- when stock prices change, I'd love to see the background change color (green or red) depending on the amount of change instead of the little triangles. So for example when a stock crashes the background would be red (the bigger the drop the brighter the color) this would let you just see that something big has happened to the market instead of a glance. The little up and down triangles feel like they're too easy to miss unless you're staring at the market.
3- please put the on map symbol next to the resource type on the market. when I see a grey triangle on the map, i don't have a way to see what it is unless i hover over the tile and wait for the detail tip to show up. I know this will not be an issue after 10 -20 games, but starting out it feels like I'm hunting for information that the other players already know.
So far I'm Loving it. (placing pirates seems a bit troublesome, maybe a tutorial level where you do nothing but perform black market things would help in the learning process)