add game to facebook

I have a game at site [[login to view URL]][1] and tried to set up on facebook as an app, it is there but don't know how to do the inviting of facebook users and their friends? and allow access to accept app, to keep track of users etc, the whole facebook set of feed template, they have changed it now, to keep track of users friends who are on? using and send notices to them of progress etc. thanks