A walkthrough of the ZX Spectrum game, Genus. A 1988 game by Andrew Daly. Collect the key on each of the 41 levels to reveal the exit. Other items give you things such as temporary invincibility and health increases.
From the recording originally sent by Rafal to http://www.rzxarchive.co.uk/ . Recorded using "rollback", a feature of the emulator which allows you to mark a point, which you can then roll back to later if you get into difficulty, and try again. More info. on the channel "About" page: https://www.youtube.com/user/rzxarchive/about
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