Pick any mode, endless for example just to see the score max out. All you have to do is drop blocks in the lowest section of the board at all times. DO NOT PAY ATTENTION TO ANYTHING ELSE. Do it as fast as you can (stylus recommended). I played for 30 mins this way and stopped because i got bored. You rack up some insane combos.
Finally a game more broken than bejeweled and meteos.