Magic Pen is a surprisingly fun flash-based game where you have to get a red circle to roll to a flag. You do this by drawing elements on the page… ramps, structures, hinges, and circles… to push, hit, and roll the ball to its destination.
This is great fun, and there’s something nice about drawing your course in fake crayon :) Of course, if you’re looking for a more serious angle, this is also a great way to learn about physics, but I’m guessing you’re here to play, not learn!
Have a look, and enjoy some Friday Fun. Requires Flash.