@Eddie_V2 it's unclear but the ending quest bonuses count as prestiges, only the bonuses apply to your restart prestige amount. So if you would get an increase of 50 from the normal restart, with the first ending prestige you'd get 75 (1.5x) instead. After you unlock that one it's always better to use that than regular prestige.
Good game. The quest screen should show more information, perhaps the cards on the left could display icons indicating they're in progress or ready to be completed, so you don't have to click on each one to see if there's anything you can complete/are doing. And also if they have a work action in progress, how many of the work points that questline is using up, so you can tell at a glance where your points are being used.
FINALLY, AFTER NINE YEARS, I DID IT. I PERFECTED ALL THE SONGS IN SCGMD2. I remember getting a new PC for Christmas '07 with a fancy dual-core processor and hoping it would run this game without lag. There was still the occasional hiccup, and I could only do most of amateur and some pro songs. Two years later I built a computer with a quad-core, and again tested this game to see how it'd run. There wasn't any more (regular) lag, but I was just too bad to perfect more than 2 or 3 on pro. Over the years I'd come back and play a bit, but could never really get very good. I recently checked out Kongregate again and remembered how much fun this game used to be, so I fired it up and thought I'd just play a few old favorites, maybe try and perfect all of amateur. New computer again, so I was starting fresh. Eventually it led me to today, when I've now not only completed every song, but I've also gotten PERFECT on each one. It was a crazy ride, but I loved every minute of it! Thanks, Shinki.
 "Idle Quest"){kind=icon}
 "Creature Card Idle"){kind=icon}
 "Super Crazy Guitar Maniac Deluxe 2"){kind=icon}