I could not find any way to reset the stats to zero. However, the stats reset to zero the next day. Also, it should not allow the selection of no keyboards.
Excellent Very useful app, and a dev who listens.
When only right bass and left treble octaves are selected, it displays this two-octave midrange on a single 2 octaves keyboard.
bug fix in free version : removed the interstitial advert screen that could cause crash on some devices.
bugfix : on some devices C1 could show up as D1 and FreePlay button had no text.
Music note game. Easy to advanced. Practice music theory, music reading & keys.