Okay, it didn't take me literally forever to figure out how to hit the...vari-burst? Whatever you call burst/stream shit like that? Anyways, I did figure out how to single-tap the short sliders so I always started the bursts with my dominant finger, and got it consistent enough to SS this, but wow that was a pain in the ass.
Osu! is a rhythm game based off of Osu! Tatakae! Ouendan! and the American release Elite Beat Agents. In these games you click circles to the rhythm of the song. Osu! also has different rankings you can shoot for, with SS being the best (Hit every note and have 100% accuracy). THere are also mods like Hard Rock, Hidden, Flashlight, and Double Time/Nightcore if you want to increase the difficulty even more.