Click to break/interact. Space to open menu. M to toggle music. Increasing level increases resource gain. Structures: The furnace uses 1 wood and 1 ore to make iron. The anvil uses iron to make 1 level. The market uses wood and stone to make 1 level. The mine makes the selected resource. Press 1 to autoclick.
Music is from the scratch library. "Dance Chill Out" and "Techno" specifically. This game was released early because I wanted it done before March. The full release was intended to have gold and coal, individual UI's for each structure, and some other small details. These may be added later.