I've played from 12 to 3AM and 8AM to 5PM, and I've only unlocked 50 or so songs. I'm actually quite pissed, I'm tired of playing shit I've played three times today in an attempt to get Carry on wayward son and ace of spades and some of the other good ones. I'm going to use an unlock code, it better unlock them all for good (i don't want to reactivate the "cheat" every time i boot up).
Speaking of stupid design, I chose to do a "challenging mystery playlist". the first time, I got who are you (not very hard), and peace sells (oh god kill my fingers won't you). the second time i got green grass and high tides. fuck that, to grind for stars i'd rather use charlene and wave of mutilation.