I love this game! But your app won't allow me to update, it even said it was able to be updated but all it said was "Play" There is now a chance I can loose everything but I can't update!!

Its a great game and a great app to spend your time on, but its been months since a last played this game because i can't update it. please fix this update thing, i don't want to make another account

I have been playing this game for a very long time, but now it tells me to go to update the game, how can I update it in this app??