Tried at work with a shitty mouse, it's nearly impossible after speed 1000, will try at home with my cyborg R.A.T, already said but hell yeah, it need a sensitivity adjust option for people which have basic mouse.
just did 9.379.396 pts on gentle song with x175multiplier, got the two lastest bagdes at once. This game is beautiful, when you are sad, listening to theses great piano song just make you feel... woah
 "Accelerator"){kind=icon}
 "Music Catch 2"){kind=icon}
It already has a sensitivity adjust option, in the options menu! :)