BTW, tried out some of this quest, pretty cool stuff all of you are doing! Keep up the good work! Also, how will you know when you are done? Do you (collectively) have a plan?
We have a Discord, which I should probably link again, and it has some general plans we have loosely agreed on. The nature of the quest still allows you to put a screen pretty much anywhere, but there is an understanding that it must be playable, and make sense. As far as dungeons, we are thinking eight, and there are some non-dungeon/ non-OW areas too (caves basically). We *have* decided on only one OW, so once that is full, we will have to work on dungeons, and stuff. Level 1 is done, but all the other levels only have a few screens.
Here is a list of all the Maps, and D-Maps so far.
Here's a list of all entrances/ exits from the overworld, but it may be missing a few newer entrances.*
Here's the discord, and you can also find some more info and discussions there, as well as a full credits page.
* Updating this one might.. be a bit tough. There is no way to easily tell which screens I haven't checked that may have new caves/ entrances. It's more or less for reference.