Folks seems set on running Uxn onto more "experienced" devices than we expected. Sadly, we don't have a port of the emulator that will run Oquonie on OS 9, sorry.
We haven't had much luck helping folks to run SDL2 efficiently on the EEE PCs either, but it turns out that X11 works reliably well. So if you're keen, give the Uxn11 emulator a try.
https://git.sr.ht/~rabbits/uxn11
Thanks for all the feedback and questions.