This is VERY well made.
I have two criticisms:
1: I dislike slider balls that a) don't fill the slider in diameter, because it makes it hard to judge when the silder is over, and b) have the same color as the slider return ball and the cursor, because they all kinda mush together visually when everything is going fast
2: I strongly recommend using sliderb0 for the entire slider circle instead of using sliderfollowcircle because the size doesn't change dynamically visually, which is very annoying
3: Some of your hitnormals need less decay and seem laggy