A limited-time beta version of the upcoming editor of Baba Is You! · By Hempuli
I heard the other versions of the editor could make maps, I was wondering if this was available in this version too, and how to do that.
Nope; this freeware editor is meant for betatesting the level-sharing functionality, and since levelpacks can't be shared in-game when the editor releases, that feature isn't functional.