At the title menu, enter the code.
Cheat--> Effect
Yellow, Yellow, Blue, Yellow, Yellow, Orange, Yellow, Yellow--> Performance mode (Guitar God Mode?)
Orange, Blue, Orange, Yellow, Orange, Blue, Orange, Yellow--> Hyper Speed De/Activate
Y,Y,B,O,Y,B--> Air Guitar
O,Y,O,O,Y,O,Y,Y--> Flaming Head
B,O,O,B,O,O,BO,O,B --> Horse Head
B,O,Y,O,Y,O,B --> Crowd has Eyeball Heads
O,B,Y,Y,O,B,Y,Y --> Crowd has Monkey Heads