Okay, this game is a little weird. In fact its probably the strangest game I've ever played. However, Rolling your Katamari (Ball which everything sticks to) around to make it big enough to pass the level is obscenely fun. The dialogue and the music is quite... interesting too, but it all adds to the charm.
It is a really, really weird game. But it is also one of the most fun games I've ever played. Period.