Ontamarama

"Aside from that we can tell you that Ontamarama is a ton of fun to play, entirely unconventional in its design - as you need to keep time in one hand, and work freely with the other - and looks to be a fresh, quirky design that lends itself perfectly to the world of DS."

Ontamarama comes across as a throwaway piece of entertainment, but there's a surprising amount of enjoyment to be had with it.