• Difficulty level select

Hold Left + I and press Select at the title screen. | [Sent by Neto]
  • Monochrome mode

Enable the "Difficulty level select" code. Set the difficulty level to "Hard" with three lives per game, then press I forty-six times, II ninety-six times, Select. | [Sent by Neto]
  • Sound test

Hold Left + I + II and press Select at the title screen. | [Sent by Neto]