You're maybe the second or third person to mention to me now that this might be something that Autistic kids might be into.
I'm not super-familiar with the Autistic community, so I haven't been consciously pushing in that direction, but I am definitely interested in making sure that the game is accessible for Autistic players, in no small part because the few Autistic kids I've playtested with have so far been really good at latching onto the emotional core of the game -- which is to try and build this puzzle-box of a world that just feels very safe and contained, where the more you learn about it and the more that you dissect it, the more the disparate systems start to fit together and make sense as a cohesive whole.
On the resource side of things, take both of these with a grain of salt because I'm not an expert here, but I do have two recommendations. The first is that there are a few child-friendly movie-adaptations of Flatland out there, and my niece watched one of them in first grade and was really into it. Flatland indirectly inspired some of the mechanics in Loop-Thesis -- particularly this idea of time being a spacial dimension that you can hop around in and move objects into and out of, rather than the strict line of cause-and-effect that's more common in other games.
Flatland was also partially the inspiration for meta-meta-time, which is how I reconcile the player being able to insert themselves into the game. The physical player exists in meta-meta-time, and is projected via their computer into meta-time, which is the actual game engine running on their computer. Then the game engine projects their avatar into the regular level timeline.
The other recommendation I'll make is the game "Baba is You", which is not related at all to space-time, but is probably the closest example of the kind of mechanical consistency that I'm trying to hit with Loop Thesis, and it might scratch some similar itches.