Interval Game Update

The "Flash Intervals" game has been updated, mainly to fix a bug where the sound-audio portion was not working in many cases. The game now bypasses the audio/sound portion entirely to provide a smoother user experience. The sound/audio portion was already bypassed on the iPad, so that experience should remain the same.

Also, stay tuned: I hope to have mobile app versions of the "flash notes," "flash intervals," and "flash key signatures" games available in the next few months.