Once you have successfully completed the game, connect your iPod, iPhone, or iPad to your iTunes library. Remove the game from your iPod, iPhone, or iPad but not from your library. Once you have removed it from your device, re-install the game back onto it. Once you login to the game, the opening sequence will commence and you will be able to go through the missions again with the same character and points that you had before. You can do this as many times as desired.