Thanks to everyone for reporting their issues and your work on resolving (or trying to resolve) them, Loren. I seem to have encountered a bug where if I load a map no avatar is generated. I'll try loading other maps and see if it's a consistent issue. I'm using Firefox 44.0. ...update: It appears to be a consistent issue.
Also, is there any difference between http://vacuumflowers.com/dd/editor.html and http://vacuumflowers.com/gardener/? These are the URLs I'm going to to make my test maps and getting no avatar when loading them to play.
I should perhaps also note that the map is smaller on those URLs than it is here (maybe two or three times smaller) -- http://lorenschmidt.itch.io/dungeon-decorator -- although the smoothness/responsiveness is better. Is the relative smallness intentional?