Here is a haiku I made about the falling sand game:
falling sand and oil
add a little fire and wax
fun meditation
Here is the original link where I found it:
link: chir.ag/stuff/sand/
Here you can get adownloadable exe which is greatly enhanced:
link: www.naglmax.de
Below is a a nice calm verison from link: fallingsandgame.com with seeds and ground (no people or slugs) (requires Java).