German mockup/demo (?) from 1988 by ?
The pointer is controlled by mouse or joystick only - no keyboard input.
While I certainly don't think this is a serious attempt to mimic GEOS with any degree of functionality the total file size of 104K does seems rather large.
Links:
https://www.cpc-power.com/index.php?page=detail&num=14278https://en.wikipedia.org/wiki/GEOS_(8-bit_operating_system)
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.
Quote from: ComSoft6128 on 06:28, 14 April 22the total file size of 104K does seems rather large.
maybe just screens or parts of the screen.