Editing Jet Set Willy (section)

== Copy protection ==
''Jet Set Willy'' came with a form of copy protection: a card with 180 coloured codes on it was bundled with the cassette. Upon loading, one of the codes from the card had to be entered before the game would start. Although the cassette could be duplicated, a copy of the card was also needed and at the time, home colour reproduction was difficult,<ref>{{cite journal|url=https://intarch.ac.uk/journal/issue45/2/index.html|last1=Aycock|first1=John|last2=Reinhard|first2=Andrew|title=Copy Protection in Jet Set Willy: developing methodology for retrogame archaeology|journal=Internet Archaeology|date=2017 |issue=45|doi=10.11141/ia.45.2|access-date=16 February 2024|doi-access=free}}</ref> making ''Jet Set Willy'' harder to copy than most Spectrum games, but means of circumventing the card were quickly found, and one method was published in a UK computer magazine.<ref>{{cite web|url=https://archive.org/details/your-computer-magazine-1984-06|title=Your letters: getting in #1|date=June 1984|work=[[Your Computer (British magazine)|Your Computer]]|publisher=[[TI Media|IPC Media]]|page=42|access-date=18 December 2022}}</ref>