Already have the game so I'm not entirely sure why I'm trying to figure this out... Anyway:
Clue #2: The instructions are part of the code - which are unchanged from the original.
Closest I see to an instruction is "CHNG" which might be "change".
Clue #3: There is a character different from all the rest which not only tells you which direction to go, but also betrays how many wear a mask.
I assume this character has to be a number. So that would be 8, 2, or 4.
Clue #1: Most of the characters are not changed in any way.
That rules out 8 since then half of the characters would be changed.
So I'm seeing "2 change" or "change 4" as the instruction.
I don't understand the "which direction" part of clue #3 though.
Clue #4: Move one class of character to after another class of character and then just.. do the math.
Two classes of characters suggests a letter and a number to me.
Adding letters and numbers sounds like a
Caesar cipher.
I'm not sure if "move" describes an actual translation in the code, or is just part of the verbage being used to describe "doing the math."
EDIT:
Now that I've been staring at this too long I'm also seeing "S[2]U[LX]TRC" which by a long stretch of the imagination could be "subtract."