Running latest version of iOS. I decided to play a game I've had a while but never got around to playing and noticed there was no sound. I plugged in some headphones and got sound. So I checked some other games and found several more without sound (The Room, Monument Valley) and some where sound worked (Machinarium, Samerost 3). I started poling around in setting but didn't find anything for muting, I had keyboard clicks turned off, so I tried turning that on. Not only did that not help with the game sound, but I discovered that I still don't have keyboard clicks. I did the usual restart. I'm gettin nowhere with this puzzle. Any help?