> I noticed that there were entities moving perpendicular to our concept of time, treating our X-axis as their conveyor belt moving them along at a constant rate.

Those entities exist: We call them photons (and a few other things). Photons move through space at a constant rate, c, and their clocks never move. If a photon were conscious it might ask "What is this time you speak of?"

It gets weirder: Because photons don't experience time they can't "remember" being in Place A "before" they were in Place B, so they might also ask "What is this space you speak of?" Photons are always everywhere they need to be, from their point of view.