Airball was a Solstice-like puzzle game that Tengen was going to release on the Nintendo. The game had been engineered by Novotrade, the same group of people which had done the Nintendo Impossible Mission 2 game.

To make a long story short, Airball was canned due to financial reasons. The game required a special (expensive) circuit board and Tengen figured that this would be hard to market. Two prototypes exist, one is more complete than the other.

Pictures thanks to Mike Geddeon.