Wow, just fucking wow. what a game. I wonder why I never tried Guitar Hero lol. But I can see why its fun. Well this is the "PC Version" Frets On Fire a.k.a Keyboards On Fire.
wiki page ^
enjoy, if you haven't already. I atleast did and I dont even like the music lol.
P.S, You might need a new keyboard after a week or so haha :P