I don't have the source for that one anymore, but it's pretty easy to make and only takes two minutes. Just connect a mousejoint to the softbody.center.body.
FYI I am currently attempting to port this lovely library to Unity. Why Unity? A few reasons: I just took an introductory course to Unity game development, and Unity has the capability of a level editor and object manager which I was lacking in Love2D. Also, Unity uses the Box2D engine, so everything in Love2D's physics has parallels there.
The downside is of course I have to re-implement my own additions to LoveBalls such as my method of making the blob "sticky", but I'm still excited for what Unity can bring to this project.
Let me know if anyone is interested in the details! I may write some blog posts on it, and if I can get Mr. IndieRetro's permission, I might even post it as a free sample on the Asset Store (with credit to the original library, of course).
I actually attempted something akin to a port in Unity myself at one point.
Just not sure how id break down 'any' mesh into a soft body.
might be other ways to do this. id be keen to fiddle again though for now I am focused on studies
I got the physics mostly working within the last couple of days. Looks like there are some extra steps if I want to render the shape of the softbody in Unity, but I should be able to make it work. I might need to borrow someone's "triangulate" function.