While Scribblenauts has a simple premise, there's more to it than is immediately obvious.
There's one Starite per level, and they are either out in the open or are hidden until certain tasks are completed.
You play as Maxwell, a young boy who wants to collect the Starites, shiny star-shaped things. Scribblenauts is a series of physics-based puzzle-platformer games developed by 5th Cell Interactive (previously known for Lock's Quest and Drawn to Life) and published by Warner Bros.
