One would think it would be easy to program what I've asked for above. But maybe not.
I think it is easy to program ... depending on the language!
I lost track if you are a programmer or not ... if not and if you didn't feel like you wanted to make it a project, give any college kid in a Comp Sci class a pizza and he'd be done with the program with slices to spare. Then since it's real code and not a painfully brittle macro, who knows, you could repurpose it to something else later!
Just for discussion value, I was doing stuff like that in 1986! (Heh but nothing ever since!) The breakthrough: while game coding was notoriously tough at the time for children on the Apple IIE and the Mac, the Commodore 128 specially added some twenty "easy-game" commands!
So I bet one of the hotshots here can whip it up in under 50 lines of code in something.
"Blank full-screen background, solid movable circle replacing cursor."
Why not just play lots of Pacman?