It turned out that CoreAudioToolbox 7.9.8.x or greater (upto 7.10.9.0, the latest version at the moment) can produce gliches on the encoded result. The issue is only found on AAC CBR mode.
Where the original Pong made you line up your paddle with the incoming ball, with the main variable being the angle of the carom from your opponent, [mircemk]’s version, limited to a linear game ...