Day 5:
I fixed the mini-map so that now fully works, and reveals with the fog of war. And I got the trade routes and settlement working in it's most basic form. There's no actual resource or culture transfer yet, but it does join 2 settlements and has a visual ship travelling between them (still lacking path-finding, mind):
The trade route will be able to travel over land as well, to reach the cities. In this case it will change the sprite to a walking unit.
There's a lot of information to get across regarding resources, what each city has and/or where they're coming from and what is needed to produce certain other resources. So to avoid any more menus (I'd like to NOT have nested menus/panels) I'm going to create tooltips. They'll be the same style as the buttons but cyan. And it will be possible to have tooltips inside tooltips (they'd appear side by side).