i'm busy trying to figure out what in the world "below" does... Apologies to anybody trying to figure anything out themselves but i'm putting what i know here:
firstly drain creates a red cube that deals damage to anything inside of it, you can drag the window around to place it on top of things (specifically the boss) and you might notice that there are some stripes just... off in the void that line up with the ones inside the drain window. Secondly, There's peer which by default just seems to let you look at what's elswhere on your screen outside of the window, but the eye in the peer window looks elsewhere and dragging it where it's looking shows another eye. Overlapping the two while having the box overlapping its counterpart changes the eye to have rays coming out of it and the iris turns into a dotted line. At this point i did what anybody looking for easter eggs would do, and got the remaining ability assuming it to be part of the puzzle, but so far have had ZERO success. It's called below so i try putting the other game windows on top of it. This lets me use my circle to overlap the iris of the eye but that doesn't do anything... i can't get the window off the bottom of my screen, checking around the entire screen itself using the gameplay window doesn't show any new secrets... i'm lost.