So forgive me if I am wrong, but the point of Sburb/Sgrub is to create a universe right? So that would mean the trolls are done with their game, meaning they should be able to populate their universe with humans, the humans being John, Rose, Dave, and Jade. Than they sort of cheated by creating the scratch and made the pre-scratch kids, who are apparently relatives to the Beta kids, so up at this point The Trolls have beaten the game, they created the new universe, populated it with humans, then the Humans cheated and created half-universe based off of their universe, which is why its so similar to their session. Then the Alpha kids were created, and that is homestuck up to this point? Once again sorry for sending this through fanmail, this was too large for the askbox to handle.
The trolls beat the game but they never got to claim their prize because Bec Noir destroyed the door.
And the Beta kids didn’t create a new universe. The Scratch changes the universe, it doesn’t make a new one.