Also known as: Nazca '88: The Golden Road to Paradise (JP)
At the screen before the start of the game, press Left once and Right 20 times. Select "00" to exit.
At the title screen, press Up 5 times before the scroll opens, then press Right 3 times when Nino (red hatted character) tosses money at everyone else, then press Left as the characters walk off the screen. The level number will appear next to the title. Toggle it with Up and Down and start the game to go to the chosen level.