Improved the icon and added -p option on github already.
mced please test this new version and see if it works as you intend it. As I currently doubt that it will work with your little bash script.
I think it will open multiple players with all your files playing back almost simultaneously (sleep 1 in between)

For the time being I will put development on a halt for one week and keep working on a webbrowser as I really need one and don't like the android alternatives. (and the sailfish one is a bit featureless)