I just uploaded a new version of Quake to
OS4Depot. Since I didn't realise that there was a newer 2.30 version on AmiNet than the 2.20 version I fixed last time (which I released as version 2.21), I re-applied my changes to the 2.30 version, plus made a couple of other changes and fixes which will hopefully resolve the problems some have reported.
The MUI-GUI is of course included in 2.40 and it should work now in higher resolutions too, like 1680x1050 (although framerate will likely be quite low in such a resolution), on a Pegasos2/G4 it works at reasonable speeds (25+fps) at resolutions of up to 1024x768. On a Sam you get around 25fps in 800x600 resolution.