OSU!

[Ngjoko]

yes. Try google it. It'd show up with "rhythm is just a click away". You know you're there if you see lots of pink.
You can play it online or offline. You download the songs in forms of beatmaps. I don't play much since the internet cafe i usually play at don't have the systems to run it.
It's actually a PC version from the nintendo DS, that's what my friend told me. I'd seen a link online that indicates that iPhones can also play this game.
You can also try youtube it, you'll get the idea of the game play. Try to search this, "osu! Neverland hatsune miku"