I just found a way to clip through the penultimate door in the game, could be used to skip the final puzzle, maybe it could also be done in the door to floor 5 to skip getting the suit.

https://clipchamp.com/watch/uH253ERbGkw

Wanted to check if the same clip could be used for the gate to the last floor and yes, it's possible, just very RNG.

The clip I shared of the clip being performed doesn't work anymore, so I'll just describe how it's done.

Basically, get any prop (I've been using a TV), face the wall you want to clip into, use the prop near the door, and jump into the prop so you climb up it, if the prop happens to turn so that you end the climbing animation inside the wall, you clipped in.