Owen Piette has created his own version of the "game" Falling Sand in C that runs natively in Windows or Linux. It retains the basic features of the original, but runs a bit faster and adds some new elements like steam and molten wax. One very welcome new feature is the ability to save and load previous games, so you can get back to work and come back to your little sand-world later. It works a bit differently than the original, but is just as fun.