I was joking about DISC's name. It didn't bother me at all.
It was not too difficult. I really like the level of difficulty, actually. Some of the faster discs or weird pattern ones were just too hard to keep track of. It felt like I couldn't do much to avoid them. If I was really good with dodging the other discs I could still make it through though, so it didn't mess with the difficulty too much. They just weren't as fun to avoid as other discs.