[sickufully]

How about a challenge system?

So basically, when you get a really good score, you can send the challenge to a waiting room for someone of your division or lower to challenge. You can set a wager in credits for whoever gets the better score and the player that decides to challenge you, has to match that wager. And it saves all the settings that player used, except for maybe scroll direction and speed. So instead of wasting a great score with rates, you can send the challenge to the waiting room and wait for someone to try and one up you.