Gaz Spence confirmed in 2015 that the game was released and can be found here:
http://www.gamebase64.com/game.php?id=3583&d=18&h=0
Case closed!
Contributions: Stefan Gutsch, Gaz Spence
Supporting content
Available downloads
Gallery
Update history
20/01/15 – Gaz Spence confirms game was finished and released
This appears to have been completed and released on 64’er in March 96. See the gb64 entry.
Cheers Gaz! Updating now!