If you wait for the second title page to appear (the one which says press fire to play) and you type in the word "GOLDFISH", you'll activate a special cheat mode. Pressing any of the first five function keys will transport you to that world, and hitting '1', '2', or '3' will take you to the requested stage. Ensure you've select the desired level before you press 'Fire' to start. In the game, press '1' for invincibility, '2' to skip worlds, and '3' to skip stages.

When the screen appears that says to "press fire", type "GOLDFISH", then pressing the keys 'F1' - 'F6' for the various worlds, and press '1', '2', or '3' for the various stages. In game, press '1' to skip levels and '2' to become invulnerable. For a bonus zone on level 2-2, play these notes on the first piano; Brown, Yellow, Red, Orange, Green.

Try any of the following for various messages: ADE, TONY, GEORGE, GREGGS, PAT, SIZ, SYD, CASSON, SHORTIE, MICK, PAUL, RITCHIE, ASH, MARK, BERNI, and HILEY.