I'll add a few brainstorms and things I've noticed...

- Most of the texts in the QR codes mention 'Iron'
- One that does not is QR5, but that one has the Magic Portal's text from Mars/Iron
- QR5, QR6 and QR9 all could describe the cell in which the game starts
- If the Aztec code needs to be manipulated, the dots and triangles could indicate which manipulation is needed for each dot.

Going on that... moving the dots in the direction of the red dot or of the triangle did not produce anything useful for me, though I've only tried moving 1 position (and not things like: Top Right triangle = 2 steps in the direction of the red dot)

Based upon the Jason and dragon references, some of the words I've tried are:

- Ladon, ladon, apple, apples, golden apple, golden apples, sheep, melon, golden fleece, Hesperides, mala, mela

Given previous puzzles a keyword more related to the bitcoin domain would still not surprise me though: Days destroyed, Generation A could still be hints.

- The overall painting looks like an Aztec code and has several QR's embedded... it doesn't mean that what's hidden is hidden using QR: I'm still considering binary, morse, braille.