Analog: while considering all you said about not worrying about aesthetics, and just seeing if everything would fit on one screen, etc. I'd still like to comment on your example as-is (to an extent "ignoring" that you know there are problems and you don't intend to go with this exact layout), if that is all right by you.

If going with selectable text on screen, two pages might work better than one. To decrease the overwhelming wordiness on display here, I'd suggest not writing out "Track" every time, and just have the number; likewise, "Dolby Digital" could be shortened to just "DD" across the board, to tidy things up considerably. And, if there were to be a static image as the background, something that doesn't have text ending up underneath the selectable text would help legibility immensely.

Again, I know it was just a concept, but I think those are useful notes if we end up having to go that direction. So, now treating this example seriously, are you saying you actually got this 21 audio options on a screen method to work in a proper Blu-ray menu structure?