If that's one of Caliborn's crappy theatre curtains, I am so triggered right now.

Jade is alive or does she not know she's dead? Wait, how does Callie know her name?

In answer to the first question, she is most certainly really dead. I haven't seen any indicators thus far to indicate she doesn't know she's in Bubblespace at the moment, so she probably got acclimitized offscreen.
To answer the second question, she probably read up on Jade in the massive chronicle of events in Rose's tome.

Personally, I'm glad Calli has another Space player around so she can start figuring out how to work her Muse powers.

^That won't help, Jade hasn't been using Space powers. She's been relying on First Guardian powers, which (I would assume) are distinct. She hasn't learned much more about Space than Callie, I don't think.

^I was under the impression that her shrinking/enlarging powers are her Space powers.

Not with all the lime green coloring involved. SBURB space colors are black and white.

[Spongebob transition note]
MEANWHILE AT THE INTERDIMENSIONAL LIMBO BEYOND TIME AND SPACE
[/Spongebob transition note]

Dicklark, need to write that one down for later

Well, the robot did go crazy. This update was both funny and creepy.

Supreme being of pure logic, ladies and gentlemen.

I'm not sure if lime-green is that exclusive to first guardian powers. There was a lime-green tint in her double-fraymotif with Dave when they fought Bec Noir.

Taking into account that it makes sense for a manipulator of space to manipulate the spatial properties of objects and that we've never seen or had suggested that First Guardians can manipulate objects like that, you can put me in the "It's a Witch Power" boat as well.

Ah, so Dave COULD make it to LOFAF via portal and not just get misdirected to Derse. Rose might have trouble, however, if she tries to just fly there.

Eh? I suppose it's not precisely the same, but a lot, if not most, of the stuff Doc Scratch Bec, and GCat did seemed to be spatially affiliated. Didn't seem much of a leap of logic to me that they could do most of the things that Jade has done.
...wait, in fact we HAVE seen Bec fuck with sizes and speeds. In the familial Strife thing between him and Jade, he teleported both of them to the top of one of her moving bullets.

Although I had forgotten about this:

I took it to be associated with their general character colors, but Time IS red, so I suppose it could have been Aspect-based.

Jade might've used scratch powers all along... or Hussie just thought balck and white would look boring as "power" - I'd agree btw.