Walkable area limit?

Hi everyone, I'm fiddling with my first mod, and I am wondering if it's possible to set a limit to the walkable area, I know how to set how far up you can go, but I was hoping you could set a limit on how far down you can go as well, I'm doing a mod based on Kung Fu from the nes and the maps have an area where you shouldn't be able to walk. I could edit the images to remove the bottom of the stage, but would rather not. Thank you in advance.

I didn't understand clearly, can you put some pictures to illustrate exactly what do you want to do?

As a new member, I'm not allowed to post external links so it seems I can't show a picture, the best thing I can do is say that if you google "nes kung fu" you can see what I mean with unwalkable area.

The bottom of the screen has a space where the player shouldn't be able to walk on, as it's not a walkable floor.

I think you mean the colision map and the color things.
Blue it's the area you can walk in, green you cannot, black it's pit and yellow it's platform to jump.

I forgot the value on the colors, but on the "sor maker > tutorials > [Tutorial] map collision" it's all the info.

But if you are to limit the walkable area only in horizontal, you can use these markers


The one on the left it's the top you can walk, and the one to the right it's the bottom you can walk, nothing can move beyond those two lines.

Okay, so let's say you wanna make this a 2D BTU, like Kung Fu, yeah, just as the picture above by Cm Blast, set the arrows from upper limit and lower limit together, this way you can make it be in a 2D environment.