In what looks like an 80% “repurposing” of Crayon Physics, Magic Pen is a puzzle game that allows you to draw your own freeform physical objects in order to manipulate existing objects — namely, nudging the red ball to the flag. But in a unique twist, you can create pins & hinges (which, in practice, is more fun than it sounds) to generate moving parts that are essential in later levels.
Anyone who’s seen the demo on my iPhone, iPhysics (another demo inspired by C.P.), may recognize this as well. Sans the very cool turning-the-phone-to-change-gravity effect.