Construction setThe Atari ST version included a utility called Airball Construction Set which allowed players to create their own Airball worlds.
Graphic modesAirball was one of the few games where support for multiple graphics modes made the game either easier (or harder) to play. In Airball's case, the CGA support managed to achieve both advantages and disadvantages over the EGA and VGA support. In some places, the lack of color made game objects extremely hard to see against complex backgrounds. But in other cases, CGA's lack of a color palette eliminated the need for objects that produce light, like candles or lanterns. (Since the EGA and VGA palette was used to "dim" the environment when exploring the deeper levels of the castle, CGA users could see everything brightly because there was no palette to dim.)
NES portA rough prototype was completed by Tengen for the Nintendo Entertainment System and was slated for a release in 1991, but the project was scrapped due to the public's declining interest in the console. It got eventually finished in 2007 by RetroZone and reproduction cartridges are available for purchase.
Information also contributed by Echidna Boy.