In Graviton you draw sand. Each sand pebble is a pixel. You will find yourself immersed in following the moving particles as they fly through the canvas image.
Adjust sand color, brush size, gravity direction and push force. Load random images form a button, save images to Documents. Finally when you are done, just burn it all away!
Take a look at following images to see what you can expect.
Alternate Gravity Direction
Load Image As Sand
Image As Sand after gravity has moved the pebbles