So if I'm to understand correctly, comparing the 2nd & 3rd "staircases", the third one doesn't work from the bottom level because there's a platform underneath the first step? I dunno... it doesn't seem like a bad mechanic, but I'm not crazy about it. It's definitely not as much of a no-brainer as something like steel arrows.

I guess it might allow for some interesting applications in traps, but to me it feels kind of unnecessary and has high potential to over-complicate things? Who am I to say though, I might be in the minority on this

Well, it basically works by causing Hannah to warp upwards onto a platform if she would fall and her feet are currently inside it. So if Hannah wouldn't fall, she doesn't get warped upwards. It would break a lot of existing mechanics if I set it up to warp Hannah when she wasn't falling, but if it only warps Hannah when she's about to fall out of a platform, it's very unlikely that it'd break existing levels. It's possible that levels exist that it breaks, but I can't think of any.

The mechanic is set up so that the player can't subvert it (walk through the stairs rather than going up them) to give more options to map-makers. If you want Hannah to be forced to go up the stairs, set them up like the one in the center and Hannah won't be able to get through until something breaks the platforms or something blocks her from going up the stairs. If you want the stairs to be optional, you can set them up like the one on the right or the left. The one on the right allows Hannah to jump onto the stairs or walk right through to the other side, while the one on the left lets Hannah walk through the ladder or go up the stairs by holding the up key to get it started.

And I don't think that this mechanic really adds much complexity to understanding the game since the game already does something almost like this. This merely extends the height at which you can warp up to platforms by 1-8 pixels (depending on Hannah's speed) by checking the position of the platform before you fall rather than after. And players are already going to have to know that platform warping is a thing, since that mechanic is used a lot.

maybe this could be a separate tile instead of a subfunction of platforms?

@Isa see my response in the changelog thread.

I commented on the youtube vid a while ago >_>
now that I'm here, maybe this does deserve a different tile.