Jamie, the game already has online multiplayer for the last 10 months. There is a game mode called Global Domination on the home screen (the other 3 modes are Play with friends, pass & play, single player).
Online Global Domination mode is only available for 13+ players, which is determined when you set your age at registration using the age gate. Similarly, we hide maps and IAP from our younger players.
Any issues send us a support ticket directly.