Finaly i made a use for the metal. You can now build a building that you can use to sell metal for a lot of cash and when you get a lot of food the houses will upgrade to sky scrappers and use much more food but will give you a larger population that will increase the amount of monney you can get from industry buildings.

This will make the late game harder so the game will still be challenging after you have played for a while. I am also working on a new use for the airport that will unlock new harder islands.