Zero Escape: Nonary Train Puzzle (Hint Added) [LV2&3 / July 5th]

important to note: there's a region restriction for (some of) the giveaway(s?), to LATAM. Ends July 5th 11:30 UTC -3. Zero Escape and the easter egg are LV3, all the rest are LV2. Feel free to contribute to the train if you feel like it, no rules other than the end time! :D

I've recently started playing a game series called Zero Escape on the DS and 3DS. I've really been enjoying my time with it so I decided to give the game away for anyone interested in playing it (on Steam), and sweeten the deal with some other games :P

Intro:
One evening, while on a walk, you feel a needle prick the back of your neck. In an instant, you lose consciousness.
Some time later, you wake up in a small room with smooth metallic walls. The 3 things that you notice immediately are: the abundance of different colored pipes coming through the walls, what appears to be a huge heavy machinery contraption (into which all the pipes connect) with a screen in the center, and, a huge, sturdy looking door that's blocking your exit. Suddenly, you're jolted into a defensive stance by a booming voice that comes from the ceiling.

"GREEETIIIIIIIIIIIIIIIINGSSSSSS, YOU! I'm so glad you made it!! Well... In all honesty, you didn't really have a choice in the matter, but nontheless~ I'm glad to finally meet you!"

While the maniac speaks, you look upwards, seeing 4 speakers in each corner of the ceiling. You manage to scoff before he continues:

"My name is not important, as is yours... There have been many before you and there will be many after you! Whether you manage to escape this room is all up to you! You'll need to use your environment to solve the puzzle of this room! Now, you're probably asking yourself, "mysterious evil guy, what incentive do I have to solve your stupid little mini-game?"... For one, your life... Deadly killing gas that kills you will release into the room on checks watch July 5th, and kill you dead! But, most importantly, if you do manage to escape, you'll get riches far beyond your imagination!!!!... Okay, kidding~... It's a few games on Steam. Anyways, I don't have much more to say, as this game has already begun! Go, my minion! Escape, win!"

You stand up and look around, confused.

Now for the game-play:
You look at the pipes in the room. Each of them is colored and has a large black print featuring one number, followed by a dash and then a character (either number or letter, i.e 2-E or 5-1).
There are 4 sets of pipes, 4 for each category, all in different colors: Red, green, blue and silver. When you take a closer look at the print you can see a crude carving on each of them. The carvings are: Cube, Star, Moon, Sun and Circle (🟨⭐🌕☀️🟡).
You write down each of the pipes' prints as well as their markings and separate them into color categories with a / between each print, just to make it easier on the eyes... You note that the number 3 doesn't appear even once in the left side of the dash, prompting you to look for the 3rd character elsewhere. You do, however, notice that all the pipes that have a #5 on their left side were carved into a 3 shape, making it difficult to understand whether the digit is the 3rd or 5th in the code.
Whatever, this probably pertains to something other than the main route so ignore this for now.

RED: 1-T🌕 / 4-2🟨 / 5?-b☀️ / 2-2🟡
GREEN: 2-g⭐ / 4-B☀️ / 1-7🌕 / 5?-d🟨
BLUE: 4-5🟨 / 2-t⭐ / 5?-Q🌕 / 1-O☀️
SILVER: 4-1⭐ / 1-y☀️ / 2-x🌕 / 5?-N🟡

Below one of the pipes, you spot a shiny glint. You pick up the item which turns out to be a small, wooden, gem adorned box in which you find a folded double sided paper. One side looks to be a scientific document of sorts, with colorful markings on some of the writing, as well as a huge Z in the middle of the page, both of which were probably added after the fact. As opposed to the organized and (somewhat) clean look of the one side, the other is a mess, looking more like the nonsensical satanic mumblings of an old, tired conspiracy nut than anything else (which you personally don't believe in, but don't hold any judgement or ill will towards the conspiracy nut for, as the kindhearted person you are). Upon further examination, the writings look a lot like the crude carvings you saw on the pipes earlier, maybe there's a connection to be made?
In any case, looks like this might be the document to help decrypt the code for the computer-machine-thing. A closer look at the screen reveals that itt has 5 characters that you have to enter for the lock to... give way (wink wink)...

Hint 1: The scientific document with the colors is the main part while the ramblings are the secondary
Hint 2: Each color corresponds with a number in the scientific document, maybe those numbers (along with the colors) reveal which digits are correct? Maybe even their placement? Beware the other colors, they might be red herrings :)

View attached image.

View attached image.