Falling Sand

Click and drag anywhere to get sand to fall and bunch up, you can also press:

• - a/A to change( reduce/increase) the grains' dimensions;
• - s to change the grains' shape;
• - d to change the grains' contour;
• - v to change the grains' color;

As of now there appears to be a bug in the mobile version where grains tend to fall underneath the frame.

Just keep filling and everything will be ok!