This game is amazing! Technology progress is so simple yet so rewarding. Of course there are some issues for example if tin is on a island without enemy, you just have simple way to win the game. Trade by boats give another way to send crucial resources or fire support with war boats, really cool feature.
I had one issue with trade boats. When I send few of them to other settlement they went there, pick up copper, went half of the way and turn around. I needed to give them order to trade to the other settlement every time when they went by corner of continent, and only when they had back with resources. First trip is fine, return is somehow broken.
The other problem is with fps drop. I notice that when i turn off hex grid everything is better so probably rendering every hex twice gives my computer a headache so maybe another set of tiles with hex borders on it, to choose from could give better fps. Also does game compute something (like AI planing, pathfinding etc.) when its paused?
I have so much fun with this game. Thanks for working on it.