A walkthrough of the 2013 ZX Spectrum game, Gem Chaser 2. Collect the gems that match your colour - then change your colour to collect the others. 70 levels to beat. The game can be downloaded here: https://bobs-stuff.itch.io/gem-chaser-2
From the recording originally sent by Albert Valls 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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