Dimension X denizens

Working on something... For some weird reason I'm writing it like a screenplay... but of course I'm also doodling. "Dimension X" is a placeholder name, but I like it enough I want to use it. Trying to come up with visual cues and an esthetic that says "Yep, Dimension X". A look for the inhabitants, vehicles, and so on.

And a random Star Wars alien scribbled in there for some reason.