I remember that the Spectrum version of the game was very good, with full colours (perhaps thanks to very fast 8-pixel jumps), as well as the arcade machine it was based on.
The author writes in the book exactly how he managed to contol the colors: the shapes that scroll pixel by pixel never mix with anything of different color horizontally. The things that move freely move in 8 pixel jumps. Magic.
Comments
Note that the book is freely available, but the game unfortunately is not (or at least [1] says "distribution denied").
http://www.worldofspectrum.org/infoseekid.cgi?id=0004256
I remember that the Spectrum version of the game was very good, with full colours (perhaps thanks to very fast 8-pixel jumps), as well as the arcade machine it was based on.
Some nostalgia, then - https://www.youtube.com/watch?v=56IFFd43acU
That includes the full experience of loading the game from tape. I guess on those who had a ZX-Spectrum will bother watching.
For actual game-play footage , jump to 5:38 - https://www.youtube.com/watch?v=56IFFd43acU#t=5m38
The author writes in the book exactly how he managed to contol the colors: the shapes that scroll pixel by pixel never mix with anything of different color horizontally. The things that move freely move in 8 pixel jumps. Magic.