Is falling sand game where you can draw and interact with various materials. FREE game on GOTD! (opens in new tab)

Is falling sand game where you can draw and interact with various materials. You draw sand water walls and fire using the left mouse button. The mouse wheel lets you change the brush size from one to ten. Sand falls down and spreads sideways water flows and fills empty spaces. Fire rises upward evaporates water and gradually extinguishes while walls remain completely stationary forever.