Highlight "Normal" mode at the title screen then press Left two times, I, Right two times, II, Up, Down, Up, Down, Left two times, I, Right two times, II, Up, Down, Up, Down. A sound will confirm correct code entry. Begin game play, then hold Run and press Select to reset the game. The game will restart in the Arcade Screen mode.
Level select
Press Left two times, I, Right two times, II, Up, Down, Up, Down at the title screen.
Level select
Quickly press Left, Left, I, Right, Right, II, Up, Down, Up, Down at the title screen.
Reset scores to zero
Highlight "Score" a the title screen and press Left two times, I, Right two times, II, Up, Down, Up, Down. A sound will confirm correct code entry.
Sound test
Highlight the "Set-Up" option at the title screen and quickly press Left, Left, I, Right, Right, II, Up, Down, Up, Down.
Arcade screen format...