Pocket Muumuu is a game developed by Sugar & Rockets (well known for the Jumping Flash game series and this game too takes place in that Universe) that's was a way of promoting the new Sony peripheral, the gameplay takes place in an alien world where your character job is about making money to buy the pocketstation games for your pocketstation and to buy additions to your future theme park. You can buy things like fans, sundials, platforms, a castle and a lot more. To make money you need to play the pocketstation games. It's easier to get money in certain games and some are just more fun to play.