So I picked up the demo. Resource collection seems to stop at 99 wood, and no matter how much I try, I can't seem to make the 120 needed for the stone mine.
EDIT: suddenly I had 116 logs after buying another worker. After spending 120 of those logs on upgrading log collection speed, I was back to the 99 log cap.
Then I figured out how to sell my logs to get more than 120 of them, enabling me to start building the mine.