Soo... I gotta comment this.
First of all congratulations on doing this simply AMAZING game. Man, I guess it was simply f**ing horrible to program this s**t.
This is one step ahead of all those guitar hero shit.
I mean, this is all waht we ever wanted, customize, be diferent, be amazing.
Everyone can heart out some button sequences, but this... WOOW.
Second of all, you need a game plot. Yeah. A game plot would be just terrific.
Third of all, the play-along style has some flaws, maybe some colors to the buttons will do the trick. And maybe only 5 buttons...
Anyway, CONGRATULATIONS. You deserve my hard to get 9.
Audio: 9,5.
Game-play: 8,5
Creativity: 9,0
BGM: 5,0 (Just take it out, it confuses the song creation)
Overall: 8,8.
Keep Walking!