This has happened to me a couple of times now. I'm using an iPad2, iOS version 6.1.3.
I play a game and then it's over. I hit Continue then Start to begin another game, but what happens instead is the music goes silent and the Start menu disappears. The camera still pans around the playfield and Rudy will still talk, saying, "Hey, Biff, play again". But it does not start a new game. To get around this I exit via the iPad home button, double-click home to show active apps, then I kill TPA. After I start the app then it seems normal again.
I play a game and then it's over. I hit Continue then Start to begin another game, but what happens instead is the music goes silent and the Start menu disappears. The camera still pans around the playfield and Rudy will still talk, saying, "Hey, Biff, play again". But it does not start a new game. To get around this I exit via the iPad home button, double-click home to show active apps, then I kill TPA. After I start the app then it seems normal again.