Geek & Mild by Sean Sperte

Drawn to Life Preview, a new DS game slated for release this summer.

Players will progress through levels using classic platformer controls, playing Drawn to Life like any other title before it. At times, however, you’ll hit areas where part of the world is missing. The game literally pulls you from the action and into the creation tool (which by the way, offers shading, drawing, brushes, zoom, and a ton of pretty complex stylus optoins), and prompts you to draw new assets for the game. This can be something as simple as a cloud, or as complex as a giant whale which will later act as a platform for an auto-scrolling level.

Choose your own [gaming] adventure returns. (Via Chuck, friend and game designer.)