Had a smile on my face as I was doing terribly. That's a great sign :]
Really, really enjoyed the tunes and the simple 4-button rhythm matching. First song I did poorly, second I did better, and by the end I had gotten a 40 note streak and was totally jamming.
I am not sure if the "funk" settings change the song, but it could definitely benefit from more songs. I loved playing this game.
One suggestion I can give is maybe add different keyboard button layouts to either change difficult or playstyle!