OMG!
It wasn't that this game was bad,but it had too much lag,even on low quality. But that wasn't the really bad part. I would have given you a 10/10 and 5/5 because I like these kind of games. But it was way too hard. Instead of just normal and expert or w/e,make easy too. Try adding some more tracks,maybe 2-3 more. And make a place called 'Practice',where you can just play without the game ever stopping. Also,I didn't like all the keyboard shortcuts. Make buttons.