Yep, it sounds like After Effects. But just now I have a water physics in 3 lines of code!
Water sinks, flows,has a surface tension, can be moved to another place and "the Hero" (box) can swim there. Although, it realised just in 3 lines of code! I like it!
P.S. I'll introduce the Level Editor Soon. You have not seen so simple editor ever!
Waterflow example:
We have a cup full of water, but let's rotate the field CW
Rotaaaaaaate.....
And wait till all water sinks out of the cup....
Simple! Simplier! The simplier than the most simple thing in the world!
Stay tuned!