Crayon Physics
To really enjoy gaming, you don't really need absolutely awesome 3D graphics. In fact, even a simple crayon drawing can make for a very interesting and addicting game. Crayon Physics is a mind bending puzzle game that will definitely get you hooked and often scratching your head on what to do next.
Don't be fooled by the super simple graphics since the game can easily get complicated and difficult in no time. It's a fun game to try out especially if you love a good challenge.