Had a play around with it this morning, connection worked perfectly, signals for play and pause worked as if thee music was on the phone itself!
I fear you have made me more inclined to go back to bed in the morning for my comfy headphones music hit!
Only thing I've noticed so far (aside the wip cover) is that once you click play and pause, it will make the button inactive until the other is pressed. This means to replay the track you must pause it, while it's not playing, and then play.
Loving this app so far, keep up the brilliant work!