The UEFI build is super cute. A particular issue I have is that I put this on my x86 handheld (a gpd win mini) which has a portrait native display, meaning everything running in UEFI is rotated 90 degrees counterclockwise, including ThoreauBASIC.
It'd be really nice if there was a configuration option to rotate the display - of course, depending on how the graphics subsystem is implemented this could be trivially easy or a royal pain in the posterior!