Take as much time as needed, it's not like we payed you for anything 

Indeed.

Only I didn't understand if the prize was actually claimed by mirth23 or if it was merely moved as a part of the treasure hunt and the endgame is actually in levels to come

He is

I wish anyone knew. We even still have to get to a public key. Feels bad man

no

Just noticed the text adventure was last updated on 13 Jun

http://textadventures.co.uk/games/view/5craldfdmkkzngf1davsna/days-destroyed-level-1

maybe something significant was changed?

edit. ok just noticed that "x cell door" now works as expected and you don't have to do "x door" anymore. Don't know if something else changed

Everything else failing, I too think we need to make some sense out of the green piping in the background. Especially the dark green piping doesn't seem random at all

Yeah I was looking at your sheet and that's some damn fine work!

I've made a spreadsheet where you can just assign letters to each symbol and see how the map changes

https://docs.google.com/spreadsheets/d/1h5uRLE51IYupTY4p94jaS77EQvwRwEu0xTKHR_DC5Bg/edit?usp=sharing

just duplicate the original sheet into a new one if you want to make changes, so we can preserve the original. The numbers 1,2,3... associated with each letter are just the order in which that letter figures in the map, reading from left to right top to bottom


This is how we go down the rabbit hole 

Thought I would jump in and tell you my two cents since i have spent way too much time on this enigma and the name "days destroyed" might as very well be what happened to my last week.

So:

1. as some others users have done i tried finding a meaningful substitution with letters for the squares with triangles and tried reading the result in different ways but had no luck.
2. there is a twitter account associated with the text adventure, https://twitter.com/whit3r4bbi7. I tried steganalysis on the avatar but it seems clean. The description of the account contains an hashtag #GTIN, which may suggest at some point in the game we will find a number and that number will be a global trade item number, or that we'll find something which resolves to a barcode, database of GTIN entries: http://www.ean-search.org/ or http://gepir.gs1.org/v32/xx/gtin.aspx?Lang=en-US
3. I tried manipulating the black and white bitmask version of the map. At first i thought it was an aztec code but to make it work it needed some manipulation. I tried using the avatar of the twitter account as a bitmask in which every black bit would toggle the bits on the mask but no luck there.
4. I tried using the QR code maxims as indications to manipulate the bitmask version of the map. Things such as
"If you make the earth fly upside down, with its wings you may convert torrential waters to stone." --> if the image was the earth and you wanted to turn it upside down you would flip it horizontally
"When in your house black crows give birth to white doves, then you will be called wise" --> use a superimposition of the bitmask in which black bits on the foreground would make the underlying bit go white
"The diameter of the sphere, the tau in the circle, and the cross of the globe bring no joy to the blind." --> as someone already said, interpret the result as braille
and so on and so forth but i still had no luck there, even if I found good looking results such as and so meh.

5. Since all other effort was fruitless I went and investigated more on the porta alchemica. From what i found there is a sigil inscription missing in the qr codes, and that is

Antimony: "Our dead son lives, returns from the fire a king, and enjoys occult conjugation."

or, from another site

Sun / Apollo / Gold: "our dead son lives, he returns from fire as a king, and rejoices over the conceiled mating"

I thought since the only QRcode not containing a description at all is the same one linking the text adventure, this missing inscription would belong to that spot (and if we assume the starting spot of the text adventure is the same spot as the qrcode, this inscription might belong to the cell). Tried different keys, no luck.
6. I also found that the wikipedia article contains these inscriptions:

a. Mercury: “When azoth and fire whiten Latona, Diana comes unclothed.”
b. Vitriol: “It is an occult work of true wisdom to open the earth, so that it may generate salvation for the people.”

while this article http://roma.andreapollett.com/S1/roma-c20.htm contains for the same inscriptions a different version:

c. Mercury: "as Latona will be whitened by mercury and by fire, Diana will come undressed"
d. Monad: "it is the secret deed of the true sage to open the earth, so to make salvation germinate for the people"

but the QR codes use the wikipedia version for the mercury inscription, and the roma article version for the vitriol inscription, so she used inscription a and inscription d. The only page i found which reports both versions of the inscriptions is http://www.esotericonline.net/profiles/blogs/7-clues-of-wisdom-from-the-porta-alchemia so she either used this page as her source, or she mixed up wikipedia and the other article. This might be too meta but it could be useful to know where she got her sources.
7. Finally, the note in the text adventure says "the map holds the key". There is a qr code in the map which says "The dragon guards the key.". If you go on the porta alchemica wiki article it says that there's an inscription saying "A dragon guards the entrance of the magic garden of the Hesperides, and, without Hercules, Jason would not have tasted the delights of Colchis." I thought there would be a link between this dragon and the one in the map, but i tried nearly everything remotely related to the magic garden of the hesperides as the cell door key with no luck.

The first step of the enigma might still be pretty simple, we're just being fed so much information and we don't know what to focus on. Still, i think the square with triangle letter association might come into play later into the enigma, when we will be able to make more sense out of it.

Wish you guys more luck than i had