ParallaXer Is an asset you can add to any Buildbox game to enable parallax scrolling backgrounds. Parallax scrolling is a technique where background images move past the camera more slowly than foreground images, creating an illusion of depth.
Here's the project page: https://indym.itch.io/parallaxer-for-buildbox
Here's a clip showing several layers of background images, all scrolling at different speeds, that's what creates the illusion of depth, this is what ParallaXer does for your Buildbox games.
More clips and info in the project page.