How about you do Quests and not just points you gained from the song, bonus points, and also "Quest Level", that you need to complete Quests to pass. and youll need to be a certain Quest Level to buy things in the shop. Example: Score 50,000 on Hatsune Mike - Vegatble Juice (po Pi Po) (Kyo's Mix) , prize 100,000 total score instead of 50,000, 100 Quest XP, ban - time removal (5 min)x2, and another 3,000 bonus points.