I like it a lot :)
I do think it would be nice to add a feature that stops notes playing automatically when you miss. It can get a little annoying to miss at the last second and then have the note play twice, making it sound even worse.
If you feel like cheating a little you can right click in the game window to freeze it up for a few seconds, then wherever you left click your ball will appear there. Keep in mind they don't stay stuck for long and it will skew the time.
Will do it sir. Come back monday with updated text in proper grammar .