Load a tour profile and select a level, then select the "Start Game" option. After the "Loading" screen disappears, activate the following cheats by entering the corresponding codes during the "flyby" cinematic of the level. Note: Do not press ENTER after code entry. Also, the codes will only remain active for that level:

CHEAT FUNCTION - CHEAT CODE
Double Speed Spins - dizzy
Unlimited Mega Ollie power-ups - hophi
Unlimited slow motion - slomo
Enable all codes - getall