Gamereactor have reviewed Nintendo's Rhythm Paradise (European title)
"Rhythm Paradise is the perfect handheld game when commuting or during other short play sessions. The mini games last for around a minute each, and there's a ton of things to do, especially if you're a perfectionist. If you can't hold a beat, this game isn't for you, unless you're some kind of masochist. For music lovers, on the other hand, Rhythm Paradise offers tons of awesome entertainment."