This game was created by members of the Kobe University Information and Statistics Club, now called the Kobe University Computer Club.
Following the initial retail release, a rebalanced version of the game with a lower difficulty level could be ordered from the publisher. The disk requires the regular version of the game in order to play. It adds an Easy Mode, which lowers the game speed and makes some of the more labyrinthine areas more easily navigable. However, the easy version of the game does not support high score recording.