This is a well put together variation of the rhythm click game. The interface is solid, the effects give it a nice atmosphere, and the song choice is pretty darn good. I have to give it to the creator that they did a pretty good job of putting it together.
However, like most rhythm games on the site, the actual rhythm aspect of it was off. To start, the timing of the rings is usually early or late; clicking right on the beat earns you a good whereas clicking before the beat gives you a perfect. As a percussionist this ruins the game for me, since I get a better score when I play the game without sound. Another problem that I had with the rhythm set up is that many of the songs don't seem like the creators actually consulted any percussionists when they were creating their click track. Their choice of when to use 1/8th notes and when to switch it to 1/4 notes seemed arbitrary and didn't flow naturally. It's difficult to create a natural flow when you're not a percussionist though, so I'm not letting that aspect affect my overall review score.
So, all in all, a nice game. I just hope for future releases the creator does more beta testing to make sure the beats sync better with the song (try a higher frame rate) and possibly consults a percussionist to help make the tracks.