Crayon Physics Deluxe (App Store) is an iPod Touch/iPhone 2.0 game highly similar to Touch Physics (App Store) in that you must move a ball to the goal (represented by the star on the right) by drawing various things on the screen. For instance, to move a ball across a gap, you would simply draw a line with your finger over the gap.
The game has 50 levels, and it includes a level editor so that you can make your own levels to increase replay value. You can play straight through the levels, or use the level chooser to jump around and play any levels (useful if you get stuck on a particular level). The music is calming and the graphics are good, but the levels initially draw very slowly.