It took me several attempts to figure out the character was jumping, mostly because he doesn't move up any during the jump. Because of that I gave the game a rather low score on the graphics. I don't think the game looks bad, by any means, but when a control feedback to the player isn't immediately clear I have to consider that a failure in visual clarity.
Once I learned that I was actually jumping, I picked up the game pretty quickly, but didn't make it to far into it before I lost interest. It's not a bad game, but I personally don't find timed based jumpers to be fun. But for the sake of objectivity, I think people who are into timed based jumpers would enjoy this kind of game. However, I'm not sure how rhythm plays into this game, which I assumed it would given the title.
The music was okay, I only heard the one track so i'm not sure if it changes the more you play or not.
Also, the opening of the game has some typing in text, and it goes off the screen until it finishes its cut scene. Not sure if that's intentional.
Overall, I think it's a nice game.