Ram Jam Corporation, famous for their adventure games and Dandy, teamed up with Mosaic to create their next game Twice Shy, an adventure game based on the Dick Francis novel about a computer program which predicts race results.
The Commodore version was announced in CVG January 1987, but it never surfaced anywhere – although the Spectrum version did… http://www.worldofspectrum.org/infoseekid.cgi?id=0007142.
Unfortunately (and thanks to Richard Hewison for the information), the C64 version didn’t happen. It came at a time of relative turmoil for the developer, and so the C64 version was never started and RamJam ceased trading as a company about 6 months after the Spectrum version was published.
So sadly that was it, its a closed case!
Contributions: Richard Hewison