Access Secret Menu & Level Select
To access a secret menu including a level select go into the options menu but do not change the default controls. Go to the sound test area at the top of the screen. Change to the following sound test numbers and press C after each entry:
A “YES” sound effect will play if the codes have been entered correctly. To open the secret menu hold “A” and press “START”. This can also be done at any point during the game.