During the "Hall of Fame" press and hold both flippers to activate the encrypted scorer.
In-game statistics
While the ball is in play, press and hold one flipper and tap the other one to view the in-game statistics such as how many more loops are required to light the extra ball, etc.
Turbo mode
When entering your high score, put in the word PRO. This will enable Turbo Mode and the game will play at double the speed.