Air Zonk/Hidden content

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Sound test mode

Hold Ⅰ+Ⅱ+ SELECT  when powering on the system. To use the sound test, press ← and → to select a sound, Ⅱ to play the selected sound and Ⅰ to fade out any music playing. To exit, reset the system.

Hidden difficulty

On the Configuration screen, press →+ SELECT . The game will black out and play a different sound effect to confirm correct entry.