For people like me, who are having difficulty with the visibility of notes due to the background stage, go to settings and follow as below

This will disable the background while keeping the other stage elements.

Edit: if a flick comes in the middle of lane, the thunder effect can blind you from the upcoming notes, the effects can be disabled by turning off the 2nd option...but then you might as well disable the limited stage settings altogether cuz there won't be anything left in it xD