Cave Story, Bit.Trip Developers Creating WarioWare: D.I.Y. Microgames

Siliconera: Wario Ware: D.I.Y. (short for "do it yourself") lets you make and share microgames on your Nintendo DS. In addition to an ocean of user created content, Nintendo got a few luminary designers to craft microgames for WarioWare: D.I.Y.