I already tried to match toribash with classical music, it is pretty hard. I like the general idea - accelerating on each violin song - but I think you could add something more by matching replays with sound "high", I'm not sure how to explain that in english, but if the sound become acute (google translation there, I'm not sure it is that right word), match it with the tori going higher, like a jump, if the sound become grave, match it with the tori going down, like landing or sliding if you see the general idea.