Absolutely mind-f***ingly good...
this is, hands down, the best music flash game i have ever played, and I've played a lot of good music flash games. hell this has got to be in the top 3 of my favorites games ever. my only con was that this way demo didnt have a harder setting, thats my favorite song definitely.
I advise you to make more before an angry mob forms outside your house and starts throwing stuff at your windows in impatience ROCK ON LIL' STICK MAN!