The first art game.
I've researched thoroughly, and after all these years, no one posted a solution. And there's a good reason for that.
Further details about Gyron can be found at: http://www.worldofspectrum.org/infoseekid.cgi?id=0002194
This is the final part, The first part is here: http://www.youtube.com/watch?v=5uL6TT6b6MM