The note scrolling speed is so fast that it makes the game annoyingly difficult and rather unenjoyable for me. In the earlier versions of the game, I do not remember it being so fast, as it seems no matter what song I choose, the notes are flying by. Perhaps a new setting that can adjust scrolling speed would be helpful?

In the interface of song selection, there is a number that can be added or subtracted, which is the flow rate adjustment

Oh that's what that number is. I didn't even realize I can click it until I saw this thread. Was wondering why the notes move so impossibly fast.