Patapon

My PSP has been sitting in a drawer for over a year now. I know it's sad. It used to join me in long trips around the world. Now I only travel with my DS. However, two recent games made me look for the old piece of junk and, who knows, may put new life into it. Once is, obviously, God of War for PSP (it's been getting glowing reviews) and the other is Patapon.
Patapon not only has a great name and very nice graphics: it also has an amazing theme song (however, haven't played the game yet, I'm afraid that it may drive players crazy if it goes on for too long). The gameplay is being described as strategy meets rhythm, and that is quite puzzling. As far as I understand, you need to rhythmically press buttons in order for your army to fight. Actually, I now remember seeing the game's banners at the last Tokyo Game Show. But I was probably too tired to check it out.
It's been a while since I wanted to try a game this hard...