You play as BOY, who kind of looks like the mascot from Taiko no Tatsujin, except he doesn't look too happy. But BOY looks content enough to be stretched to potentially endless lengths by the player, which is done with the left and right analog sticks. There's no real set goal, but by stretching BOY, the omnipresent entity, GIRL, grows. GIRL grows with every player's (everyone in the world playing the game, that is) effort. It's multiplayer, but it's not. According to the in-game manual, the larger GIRL gets, the more planets she can visit, and the more reunited the universe becomes. It's lovely and happy and fluffy. It's Noby Noby Boy.
It's got the same style as Katamari in terms of graphics and, well, identity as a whole. Like, you know, the 'very charming, very quirky, very odd' identity. At the beginning of the game, it told me to guess the controls in the form of a quiz. And then I got a Trophy for it! Hooray. And like Katamari, it's some kind of breeding ground for sadists. Getting rolled up by a Katamari would probably be the worst death ever. You'd be maimed and crushed. In the end, you would either be disintegrated by eye-lasers or turned into a lovely planet. Eventually, you get to ruin whole cities and continents with a giant rolling ball. In Noby Noby Boy, you can eat cats. I totally ruined a small town by knocking the roof off someone's house and pushing the house over the edge. I fucked up a robot. I ate all the flowers. Surely this is criminal. But it's the kind of game you want to come home from work to sit down to and just relax with for an hour or so.
Do you have seven dollars? Do you have a PS3? Surely if you have a PS3, you have seven dollars. GREAT! Now go and buy Noby Noby Boy. I enjoy it very much.