There's really no where to say this, so I'll say it here. There should be a mode where a song plays and you just bang around on the bongos, doing your thing, and it remembers what you do so you can go back later and play the song, now complete with the red, yellow, and pink circles that you just put there. I've wanted "create" modes in every rythem game I've played. Then NO ONE can complain about the difficulty, since you can determine it yourself.
<3 Band Brothers