Its actually not that complicated of an algorithm Each pixel is simulated individually and follows very simple rules:

1) If you can move down, move down
2) If you can more either right or left, chose a random direction
3) If there is only one direction you can move, do that
4) If you cant move dont move

It uses basic picelTesting to determine a direction it can move, and both water particles and terrain are solid.  I was inspired a lot by the Power game http://dan-ball.jp/en/javagame/dust/

Do you think Waterworks is possible in Axe?  If so, I think someone needs to port it!

Would a Peggle port be possible?  I think that would be just about the coolest thing ever!

I think I'm going to try and make that water physics program, then maybe add a full World Of Sand capabilites to it.

Btw, WOS was one of my favorite games for the computer, I'd spend hours playing with it.  I remember there was a program on ticalc.org that was a falling sand clone, but...it left a lot to be desired, it was written it ti-basic, slow and only had lightning and (basic) seeds iirc

I assume you mean 'powder game' and yes, its fun as well and has a completly different element thing iirc, doesn't it have wind and such?

I haven't played it in about 2-4 weeks, should I try it again, or just leave it for now?

WOW!  I can't believe its so fast!  Also, that website is really cool!

EDIT:  If its fast enough, a port of that game to the calculator would be really really neat and original, although with only black, light gray and dark gray, there really wouldn't be that many possible objects.

Oh it was not by me it was by Builderboy. I just did a second screenshot of it with different solid patterns