Here's a brief description followed by the unique (and rather long) release date announcement trailer. Watch it...and be happy (if not a little crazy).
With even more content than the original, LocoRoco 2 will add plenty of gameplay enhancements (like swimming in underwater levels!) and will feature new story-driven stages, unlockable quests, a new twist to the game’s catchy music, and multiplayer mode via ad hoc.