How do you get the cloud moving backwards particles?
I have two different objects, both with the Cloud sprite; one is just always Move and the other has two Babas (or somesuch) moving back and forth and activating a Move rule every other turn. At the right edge of the level are objects with the rule Cloud On (Object) Is Fall (Left), and at the left edge of the level are objects with the rule Cloud On (Object) Is Hide.