This is because you aren't actually playing through the 'net. You log in initially to create a character to have a name to post your scores to. Then, when starting a new game, (while still logged in), the parameters you chose will be checked to see if they correspond to those allowed in the Metaverse. Certain things are not allowed, in order to keep things fair for everyone. Most mods are not allowed, as well as certain custom racial characteristics. After this the game should start normally. Just play the game as you always do. You don't have to log in every time you play. Play, save, play some more; and when you finish, the game will prompt you to submit or not.