This review is absolutely ABSURD.
Ok, so this game is pretty hard. It is by no means impossible, because with practice you can get a feel for the rhythm in each game. The first few levels are very, very, simple with very, very simple rhythms that don't even require you to look at the screen.
I've given this game to many people and they've all been hooked at the first minigame. To be honest, I'm slightly confused at why they gave this game to such a rhythmically challenged reviewer AND as to why they gave set the rating as 6+ even though they found it so difficult. In summary, if you have no sense of rhythm or musical ability, you probably will find this game so hard and you probably won't be interested in purchasing this brilliant title in the first place.
DO NOT LET THIS GAME PUT YOU OFF. WATCH SOME GAMEPLAY VIDEOS ON YOUTUBE AND SEE HOW SIMPLE IT IS.