For those who despair that casual portals only ever offer the same hidden object game over and over, here's something a little bit different:
From the screenshots, you might think it was a platformer. It's not... you don't have to control the character running and jumping and dancing and spinning, the game does that for you. Your job is to play a rhythm game, and tap the Left or Right key just as the character hits the appropriate arrow. To a groovy soundtrack, of course.
Like many rhythm games, apparently this gets insanely hard, and it's not doing very well on Big Fish (which isn't exactly a big draw for people looking for games that require reflexes!)