If there is an update that adds more key colours, then i am replacing key cards in chapter 1, recidence (excwpt for blue card), replace block puzzle with keys in the next map π and add more places in the 3rd π.
I might even modify ch3 to make it a lot bigger for this lol
@Nedwardwastaken explaination
you use an item on a door facing away from u
You find a note with a letter and a number signicying the item u use on the door, only the keys (minus white) and hammer
understand now?