For custom music, I’d first check whether 0 A.D. is loading tracks from another music definition or fallback directory, since that could explain songs appearing outside the civ music file. For the playback issue, keeping the music state persistent between pages may prevent the theme from restarting. Also, if you’re testing different audio setups and notice muffled or distorted sound from your speakers, you can try Fix My Speaker to clear water or dust from the speaker grille before troubleshooting the game audio itself.

Maybe make the Skene 20% larger, not to proportion it to the rest, but to proportion it to units. I'd sat the player color awning could be a little taller.  Imagine sitting in the cheap seats and not being able to see the orchestra or the stage. Othwrherwise, I'm really loving this. 

Maybe placed on the corner? 34:44 appears twice after all, and maybe 22:11:24 could be placed on the very right of the "Elapsed" notification line. Could the notification panel length be automatically adjusted according to the length of the notifications? The word "Wonder" takes another line. Could the notification panel size be automatically adjusted according to the number of notifications? There's a big empty chunk blocking the view. Could the notification panel be made transparent (or kind of removed)? I don't see why it's needed, it could work like those center-top notifications. Personally I wouldn't use the Eye of Horus because it's a strong reference to one civilisation in particular.

I found a different reference for a stage, which I prefer. It has a stone building in it, but the whole structure still looks "rustic" enough I think. Still a wip, so UVs, props and all that small stuff are incomplete. If I'm on the wrong track it's good to know early though, so what do you think?        

Screenshot from nomad wonder game tonight: