Thanks for playing,
If you press i you can pull up tile info that gives your the details of each building, you can scroll through that with the up and down arrow keys. Iron is used to upgrade cards by playing them to the blacksmith, playing workers to the townhall makes a tile draft appear quicker; I think teaching the game and making finding this information out more intuitive is something I would focus on more if I had another shot at making this game.
There was a lot cut to fit the scope of game in a month, a lot of tile combos and even a light combat mechanic against bandits.