Patapon hands-on at Gamespot.

"While many games fall into a neatly definable category, occasionally a game appears that is unlike anything you've ever seen before. Games such as Loco Roco, Rez, and Echo Chrome all fall into this category, and this year's Tokyo Game Show hosted another such title in the form of Patapon. Sony's new PlayStation Portable title is a rhythm action game at its simplest, but it could also be described as an interactive cartoon, a tribe-based action game, or an interactive screensaver as well. It was proving very popular with the small crowd of media during the first day of the show, but we managed to wrestle a PSP out of someone's hands in order to check out what all the fuss was about."

Full Source: Gamespot