If you enjoyed that, you might also enjoy It&#x27;s Behind You (<a href="http:&#x2F;&#x2F;bizzley.imbahost.com&#x2F;" rel="nofollow">http:&#x2F;&#x2F;bizzley.imbahost.com&#x2F;</a>).  It talks about porting R-Type (side-scrolling space shooter) to the ZX Spectrum... and similar fun around squeezing down high-end (for the time) arcade games to run on hardware that shouldn&#x27;t really support it - a great read!