I believe this app is destined for greatness. Composers will compose for it. Can you imagine "Tocata in D minor for thumbjam and piano"? Neither can I.
So I think you should consider changing the name. Since it uses the fingers ("dactilos" in Greek) to make sound, how about something like "dactilophone" or simply "dactilon"?
Just throwing this out. I'm sure people will come up with even better names
