I love this game!! But in the interest of spurring discussion, I will point out a couple flaws.
There is only one song. I was really expecting more this being a CD game.
I also felt there wasn't enough variety in the game. There are only a handful of backdrops, and only one of them is animated.
Lastly, there are only 30 levels! Maybe I was a bit spoiled by the NGPC version, which has 99.