At the main menu, select "Options", "Cheats", "Enter New Cheat", then enter one of the following codes to unlock the corresponding cheat option. Note: Each note or chord must be strummed. Press Green at the "Cheats" menu to turn off a particular cheat.

Air Guitar
Press Red + Yellow, Green + Red, [Red + Yellow] two times, [Red + Blue] five times, Yellow + Blue] two times, Yellow + Orange

Hyperspeed
YO, YO, YO, YO, YO, RY, RY, RY, RY, RB, RB, RB, RB, RB, YB, YO, YO

No Fail
Press Green + Red, Blue, Green + Red, Green + Yellow, Blue, Green + Yellow, Red + Yellow, Orange, Red + Yellow, Green + Yellow, Yellow, Green + Yellow

Unlock All Songs
Press Red + Yellow, [Green + Red] two times, [Red + Yellow] two times, Green + Red, [Red + Yellow] two times, [Green + Red] two times, [Red + Yellow]