Max & the Magic Marker is a physics based 2D puzzle platformer, in which the player controls the boy Max and his Magic Marker. While Max enables good old platforming fun, the marker provides the game’s signature feature: the ability for the player to draw directly inside the game world where everything drawn becomes physical objects. This feature is used to complete levels and overcome challenges but it also provides the player with a unique tool that in itself is fun to play around with.
This is extremely good. I dig. Think Crayon Physics - the gayness + good stuff. Apply this algorithm and you have awesome-in-a-box.