The most fun you'll ever have with flash.

[Chrono Crow]

http://andyslife.org/games/sand.php

The most impressive physics I've ever seen in a flash game as well as creative chemical combinations. It's fun to make a forest and burn it down with napalm.

[Portals]

Ooh! I love this! My brother actually found out about it a couple of years ago, and I had forgotten about it. It's fun to make a structure to mix the salt and water so you get a bowl of salt water at the bottom.

[chrismachine]

I created a zone with no spillage, and which never fills up. pretty cool!

[Portals]

I just tested the explosiveness of the flammable material-
Oil < Gunpowder < Napalm < C-4 < Nitro.

Nitro makes really cool explosions.

[Itszutak]

Ah yes, fallingsand.

That game does some amazing stuff with particles; I believe in one version, you can mix water and salt to make salt water.

And then, with the right placement, you can purify the water. First person on the forum to take a screenshot of a water purifier gets an E-cookie.

EDIT: There are multiple versions of this game. Most likely, you'll have to search around for the correct version to purify water. >_>

Addendum: http://fallingsandgame.com/viewtopic.php?t=1875

All the versions.

[James]

Java.

I wouldn't say the physics are especially remarkable. I've seen similar before, and the water isn't exactly very fluid. That's not to say it's bad. I've just sat watching it for probably at least an hour. It's like a rickin'-frackin' ant farm or something.

[MysticalDescent]

BLOW BY BLOW ACCOUNT

Can nothing disturb this pleasant Utopia?


OH poopcakes A FIRE!



OH poopcakes GTFO OF HERE NOW WE ARE ALL DEAD YOU IDIOT


(I took a better print screen but as a spur of the moment thing did this instead)

Now look what you done.

[Saltine]

Yeah, I wish they didn't call the blue stuff "water". It is very nonwaterlike.

[James]

WHAT ARE YOU TALKING ABOUT WATER PILES UP EXACTLY LIKE THAT IDIOT

[kzager]

Maybe it's mineral water.