I like the concept, and I'm a sucker for rhythm games, but I think the execution could be improved. I guess it would help presenting the game as a traditional rhythm game, like DDR or similar ones, so "ruining the player's score" would make more sense. And althought I think the mechanics made sense, I guess some tweaking could make it more in line with rhythm games (for example: instead of delaying the "notes", it could be changing the note's row). Also, the fact you used pre-existing audio probably didn't work in your favor, because it would be cool to see the player losing points affecting the sound of it, like when you miss a note in Guitar Hero or Rock Band, that it plays an out of tune sound and they mute that instrument's sound. Hope you keep working on it and improve on it, tho. Nice try.