Since my first comment I have managed to come up with some hypotheses that align with some of the game, but no idea if it gets me any further
I get that you can't give away much, but what you have given players is a zip file, a game, and the single goal of finding enough info to obtain a password. I swear I came across a mention somewhere that hints would be posted on social media, but I've only found gifs showing basic gameplay mechanics.
I've played games with secret languages before and many other puzzle games, but without in game feedback or even an idea of what is signal and what is noise, I feel like I am just spinning wheels in the mud
Just in case it isn't clear, I have completed the game and revisited a few areas.