Crayon physics is a really great game that tests your artistic sense and physics. No you dont need to be a particle physicist.
The demo version of the game comes with 7 puzzles and is very simple to learn and fun to play. The aim of the game is to collect stars by making a ball to move towards a star. The first puzzle can be solved easily based on the instructions given in the game background.
This is just one way to solve the game, but the same thing can be solved in innumerable different methods. The beauty of the game is tat its not a science, but an art. We learn handling the mouse, physics and art all at the same time :)
Hit the space bar to reset the game and the esc key to goto the menu. Do let me know if you solve the puzzles in the most artistic ways possible.