No idea! The date stamp of the .PRG is November 1990, so it was probably released around then. Looking at the files with a hex editor I can see the names Eric Metens and Muriel Tramis, who both appear to have worked with Coktel Vision but a look on MobyGames doesn't seem to list anything remotely like this. Eric Metens seems to have a twitter account https://twitter.com/emetens
, might be worth a go if you have twitter as well.