Classical demo-menu looks like this. No need to put it on github. It's too simple.
exten => 777,1,Goto(demo-menu,s,1)
[demo-menu]
exten => s,1,Answer(500)
same => n(loop),Background(press-1&or&press-2)
same => n,WaitExten()
exten => 1,1,Playback(you-entered)
same => n,SayNumber(1)
same => n,Goto(s,loop)
exten => 2,1,Playback(you-entered)
same => n,SayNumber(2)
same => n,Goto(s,loop)