Cool entry!
The only thing that bothered me is that if I ever got too laid back, (like a liiiiiittle late) it would still count as a miss then I'd miss the next one and it'd always take me 2 or 3 strikes to realise that I'm all off tempo (which I'm not really by the way). I remember adressing this for one of my jam games (Keep it Afloat!) and it was a pain in the ass haha!
Loved the music/SFX and the idea of combos triggering pieces of the music is great and very well executed!