This came out a while ago, but it’d be a shame if anyone missed out on it… Phun is an incredible 2d physics sandbox developed by Emil Ernerfeldt for his Master’s of Science Degree at UmeÃ¥ University, Sweden. The game lets you create objects of any size or shape and then hook them up to springs, chains, and other objects (all the while tweaking variables like density, bounciness, and friction). But what really makes Phun so “phun” is how intuitive the interface is – it’s super easy to use and even lets you undo and redo. No need to worry about making “mistakes.”
I remember spending a lot of time as a kid playing with stuff like Kid Pix on the computers at my school. Not to knock Kid Pix, because it was pretty awesome, but if Phun had been around back then, I probably never would have gone home.
(Note: To make water, just right-click any object and “liquify” it. This isn’t explained in the in-game help, so it took me a little while to figure it out.)