Hyokkori Hyoutanjima: Hyoutanjima no Daikoukai/Hidden content

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Sega logo ™ symbol

While not released outside of Japan, code exists to add the ™ symbol to the introductory Sega logo if the game detects it is being played on a Western system.

Level select

On the title screen, press  START . A number will appear above the title. Press / to toggle the number, and  START  to start from the selected level.

Invincible

Turn on the power while pressing

HOLD

and wait until the title screen appears. When the game starts, you will not lose energy even if you collide with an enemy.