What is this AquaForest, keep hearing people rave about it, might have to go check it out.
It's a physics game where the main goal(s) are to get the liquid from position A to position B.
You've a toolbox of options such as drawing terrain, using knives but also in later levels things like making fire for the water to drop on (turning it to steam) which then condenses into a sponge which drips elsewhere.
Hard to describe really other than a fun little physics game which uses the tilt technology to great effect.
Also has a freemode where you can simply draw things on the screen like pools of water, lava pits and then mix it all together.
Good review here:
http://www.pocketgamer.co.uk/r/iPhone/Aqua+Forest/review.asp?c=8328