Using mylib with lua

[semiprocoder]

How do you access mylib with lua, because I know that minecraft 2d does it it would be nice if I could do the same with my games. I want to be able to use it as a file as well, which I don't think, but hope, is possible. I want to be able to have some legit cross calc saving capabilities and make it easy to cross calc add new levels without redownloading your game and make it easy to add your own levels into flow and more.