Day 4:
Sadly I wasn't able to get much done today as my parents came over for dinner, prior to that there was a bunch of house cleaning. So I wasn't able to get functioning game-play in as I had hoped. I did however complete the code for UI buttons so I can add callbacks to them now. I also added the "deep water" feature I mentioned yesterday and added several more cities:
You can see from the minimap (which is in the wrong location, lol), that the deep water isn't currently drawing the correct color, but it shows how more secluded it can make some places, as seen with Malta there.