itch.io

Off of what the game hints at throughout the story I'm guessing it's supposed to be open-ended and based on your own speculation or preference, and I think this applies to every ending since they are similarly vague

I think  it's kinda implied that it's just a dream that MalO created and the world ended, but it's left open to interpretation so you can explain it in any different way.

Depends on where you got the ending, I think.

In most, it is a dream created for your last moments.

In at least one, it's a dream created to make the final moments of that reality pleasant .

And finally, in one case, it shows her preserving what she can of you after she accidentally kills you...