The "Perfect+" zone either moves or the game is really bad at recognizing it because I have recorded myself playing & doing frame by frame comparison along with overlapping two instances of the same song and seeing the game count one as a great, one as a perfect, and one as a perfect+ when they were all in the exact same spot. The game is also bad at picking up when you swipe/hold & swipe. Almost like they want people to fail so they spend money on gems.....not happening from me. Fix it or no $.