As an enthusiast of retrogaming and retrocomputing, Matt Westcott has been in ZX Spectrum and demo scene for many years. Recently when Netflix's Black Mirror needed an easter egg for their interactive episode Bandersnatch, they reached out to Matt to write a new game for the ZX Spectrum in 2018! Bandersnatch's plot had the main characters writing video games in the 80s and a secret easter egg led to "nohzdyve." How do you write a game for the ZX Spectrum in the 21st century?