For the last minutes I've been messing around with the clipping of objects, and I've found 2 corners that raise your height

The first one is a small boost on the Light Room, to the left of the stairs, there is a corner with a box and a small one, you can lift about a feet by messing around with it and trying to walk into the corner, better doing it than describing to understand what I'm talking about

And the Second one is bigger, about 2 or 3 feet, it's on the Tiger's Room, on the big gate that you open with the button, there is a corner with some vines, by walking into it slowly you can raise your height noticeably, and crouching may have some affect on it but I'm not sure

This might not mean anything, but who knows Might post a video of it if it's hard to understand

The way I used to do was to hold both down and right for around 3-4 seconds, lower down the camera and turn around This required a lot of trial and error and it was super inconsistent While testing to see how fast you can do it, I got times around 2.50, but adding a human factor it's possible to get a 2.8, the speed of the character is essentially the same but there's a difference between being ready to click the button before the stairs and after, being more difficult to set up but both of them is hard in their own way

Ideally you would walk while turning around but the practice required to do it seems absurd, specially with the slow loading screen (which you can't speedup with Cheat engine fun fact, it's an actual loading screen)

Some Croissants disappear in subsequent runs (after you eat them or get the achievement I'm not sure, someone more knowledgeable would know) There might be a way to reset this so they all appear but I'm not sure

EDIT: Some croissants only appear after others have been eaten, so there is an order, you can't take the sign one before eating the one behind the vending machine, so that's one thing to keep in mind

I'm tempted to do a route for this one