Screenshot of the Day: Crayon Physics

A triangle works as well, actually.
Crayon Physics is a physics puzzle game in which the player draws objects to get the red ball to the yellow star. It's a pretty simple concept, and much of the joy in Crayon Physics is in its simplicity, but the puzzles, especially the more advanced ones, are both fun to play and make you feel smart upon solving them.
The art is very nice, keeping with a simple theme. Interestingly, I've found that this is a great game to play with other people. It's incredibly easy to learn, but engaging enough to keep the attention of onlookers, who will no doubt be shouting advice and grabbing the mouse from you as the levels get more difficult. Crayon Physics is a game for simple fun and simple learning.