20'400. Wow. Okay. It seems really unfair for you to just take the top place in the Fun leaderboard like that. Damn.
Maybe focus some more attention on the current color (though now I realize that the floor was the same color). Too often did I think the "next color" was the current one.
One thing I would suggest is to add ambience and crowd cheering, I think it could add even more to the atmosphere. It sure did with Crystal Ninja - I downloaded some crowd cheering from freesound and it instantly made it so much more exciting and fun.
The only thing this game lacks apart from that is more visual effects, maybe some screenshake, more particles, and of course more levels and music. Really, this could become a hit rhythm game if you polish it up. Such a cool concept. Congratulations.