Level select
Enter "[Saturn][Spaceship][Rocket][Heart][Skull]" as a name. Then, press L + C-Right + C-Down to enter the special characters in the name. Any level in any game mode may now be accessed.

Lines mini-game
Enter "LINES" as a name. Now the object of the game is to remove an area large enough to released the trapped character. Line up three pieces in a horizontal or vertical line to remove them.

Hidden music
Enter "G[Alien head]MEBOY" as a name. Then, press L + C-Right + C-Down to enter the special character in the name. Enter the audio screen to access nine additional songs.

View vortex sequence
Enter "VORTEX" as a name. Then, hold the reset button. Now a sequence showing all robots being sucked into a vortex will be displayed after several seconds. Release the reset button to end the display.

View credits
Enter "CREDITS" as a name.