Rhythm Heaven is a game that is hard to put down, despite some flaws.
In these minigames you have 3 controls. Tap, flick and scratch.
The game has some amazing tunes that you will get stuck in your head, although these do have one huge problem for me, but only in a number of them.
A few games in Heaven have voice lyrics. My god. They are awful. I think I throw up a little when I heard them, I wish you could turn them off but no. Good thing the minigames only last 2-3 minutes.
The style of the game is in the viens of WarioWare. Cartoony, funny and easy on the eyes.
The difficulty in RH depends on your rythmic abillity, like I said. I found the game to start off easy, as each game gives you a practice to get used to, but some of the challenges are downright hard ;)
If you are finding a challenge too hard, you can skip it, by failing three times in a row, and going to the café. Only if you want to though.
Now, the flaw in RH lies in the controls. They just arn't too repsonsive. I'm not one too be too picky ( :P ) but somtimes it fails the challenge for you, which is extremely annoying when your going for the shiny perfect.
All in all, RH is a great game that should not be missed despite the difficulty. Buy or rent, you should defo give this DS gem a go.