Video Game artist veteran, Paul Reeves, has made the following quote about Zenith - a game with a mix of platform and racing action.

This was the first video game project that I worked on, during my time at DMA. Zenith was a future sport style game show, where the participants had to scale various towers on different themes, while avoiding obstacles and other players. The first to the top wins.

Zenith however never saw the light of day and wasn't mentioned anywhere to my knowledge. Most of the tools made for Zenith were later used in the making of Body Harvest - a game that took nearly 4 years to make. The game was most likely canned because of Body Harvest' horrible state, a game Nintendo wanted badly but ended up not publishing. A lot of the people working on Zenith were moved over to work on Body Harvest.

source: smoothdevil