not bad,
well, to be honest i seen part of guitar hero and thought it was fun but when i played this i thought it needs a better reward for killing the zombies, you know like lotus swarm or mybeatom blast that fries all zombies on-screen and a anti vires that kills instantly oh, and i think you need a boss for the game, mybe like the nemises or a whole swarm of zombies and you use the guiter as a wepen,
try that in a sequea, oh! i allmost forget to tell you how the nemisis looks like,hee hee.
if you don't know what the nemisis looks like follow this link:
http://images.google.co.uk/images?svn um=10&um=1&hl=en&sa=X&oi=spell&resnum =0&ct=result&cd=1&q=nemesis&spell=1
if it dosen't work, go onto google and type in neisies
thanks,
Jedi4ever. :)