A pretty solid game.
This game was fun in basically every aspect. The music was fun, and didn't get annoying. It was of similar style to the oh so popular GH and DDR games, with its own cool twist. This game was very fun, and addicting. I do have a simple piece of advice for this game.
Easy mode needs to be easier. I'm all for playing difficult games, and having a good challenge, but the best of games have a wide range of difficultly settings. The ridiculously easy, that can be done on the first try, and the next to impossible. (The ignore your your family, friends, and significant other to practice difficult).
So you want it to be hard. good, I commend you on that, the game should be difficult. But every game needs a mode for the people that just want to play the game and beat it without any sweat. Just pull the 'you need to make it harder to see the ending' gig.