It was either this or Once in a Life that I had ended the stream on, for a total of 14 SS's in that single stream. And until recently it was the most I've done in a single stream at this level. I mean, unless I just get really un-focused/irritated at a lower-star map, I can knock out 20-30 2* maps at once, but that's not as easy at 3*'s.
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.