tommohawk2013: OK, just to come back to this with a resolution. I tried going into the AMD software to update the graphics drivers. When I tried to launch the software (Adrenaline), it said I didn't have a graphics card supported by this version of the AMD software.
So I uninstalled it all and re-installed the latest optional update from 15-Nov-2022 (22.11.1). I previously had the WHQL version from 10-May-2022 (22.5.1).
I suspect a good old uninstall/reinstall cycle was all that was needed. I found this exact weird "not supported" problem on another computer just recently. I'm not sure what is going on there.
Anyway, Samorost 1 is now launching fine. I can see the graphics.
For me upgrading from AMD Adrenalin 22.5.2 to 22.11.2 fixed the issue as well.