Hi Matthew, when you go to king.com do you first click on the game that you want to play? Then there should be a "log in" showing towards the top right. If you click on it then it should give you the option to log in or create an account.
I would like my Facebook account to sync with the king.com website because you screwed FB users by reducing the number of moves available on nearly all the levels. If I have to start all over then I am done.