iMagic's Marble Madness Cheats
Begin game play in two player mode with a single player.
Bonus time is awarded to the player that completes the course first.
Since player two is not a participant, player one will always collect the bonus time.
Go to the options screen and select Test FX 2 and Test Music 5.
Now go to the Select Level screen, and you'll be able to start on any level you want.
Stay where you are on the first level for a surprise.