I made my default-0 ~ default-9 all little circles so that instead of numbers, well it displays circles...
It works well, except there's just one small thing that's bugging me.. After 10 notes of the same color, there would be two circles instead of one.. I've been playing around with the HitCircleOverlap for some time, but had no success in finding a good number to make it remain at one circle, consistently being in the center (at 50, there would always be one circle, but occasionally it would be more to the right)... Anyone happen to know a good number to put this at?