Small ( but perfectly formed ) German demo from 1993.
I keep this short by pressing the spacebar but if left I'm sure this would run until your CPC died of old age.
https://www.youtube.com/watch?v=EdyUYbYiWJY
https://www.cpc-power.com/index.php?page=detail&num=17687
https://www.cpc-power.com/index.php?page=staff&lenom=Julian%20MAREK
https://cpcrulez.fr/info-jaysoft.htm
https://www.cpcwiki.eu/index.php/MOPS
https://demozoo.org/groups/58563/
Not emulated - original hardware and software.
Please note that the aspect ratio for this YouTube video is 16:9 but the CPC monitor
has an aspect ratio of 4:3 so you may wish to adjust your viewing device accordingly.