Falling sand is actually not a game but a visual presentation of what can be done when you mix these natural elements up.
So, its basically like a black space on the left-hand side and the elements on the right. All the elements are natural like water, seed, sand, lava, oil, wind, rocks, etc. So, choose anyone you like and click on black space to add it. Again, choose another to mix it and see the results. You can add many as you like and see the results.
Click on the reset button to clear it up and start again.
There’s no mission and levels in this game. Actually, this game can be useful for kids as a nature education.