The sms system that Voidsay is talking about would be the way you need to do it. If its too difficult you could do an input field but that's going against the input rule which could negatively affect your "adherence to restrictions" score.
Okok thx, I think for now i will just add a random user id, and if i have time i will create the nokia input system.One more question can I have a server connection to store / manage the highscores?
yes
