I don't know if it's because I suck at playing streams out of slider-ends or because I could not get the speed of those bursts down at the beginning, but I had to retry over 50 times just on the intro alone. I mean, playing sliders like that is still difficult for me (unless it's very on-beat and rhythmic, like the ending streams on Sidetracked Day (Cut/Short Ver.) [Hard, 3.79*]), but it still feels like there was something else entirely cutting into my ability to hit it; like, I was delaying too long after the slider-end to start the next triplet burst, or something. Very frustrating.
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.