Its Inhabitants have no individual freedom, since their actions are not only predestinated (which in itself arguably invalidates free will-or not) but forced unto them by the Alpha-timeline. Every attempt to break out of the destinated path only makes it happen and-in the most cases- kills you, your friends and your timeline, until no spectators are left.
Kinda nitpicking here but this isn't completely true according to Aranea.
AG: Reality itself is using you and many others to propagate its own existence. Strictly speaking, there is only one path to its successful propagation. 8ut it still permits you to make choices. Not all that are conceiva8le, 8ut some nevertheless, as dictated 8y who you are and the challenges you face. And you are free to make key decisions however you like, as long as you understand that some of these paths unfairly or not will lead to o8livion. 8ecause those choices do not contri8ute constructively to the perpetuation of all existence, including your own.
AG: Such is the 8urden assumed 8y anyone who plays this game.
The fates of those involved in the game are mainly predestined, though they are allowed to make some choices. And she implies that those not involved in the game do not suffer from predestination, but they really don't have any impact on reality. Which is kinda horrific itself. You are either one of reality's tools and used to ensure that reality continues to propagate, and your free will is largely pointless because any timeline where you don't do what reality wants is doomed to be destroyed. Or you don't suffer from predestination because you cannot impact reality in any meaningful way, so you are too unimportant and insignificant for it to bother.
Wow, if Homestuck wasn't so silly, it would probably be very depressing.
ROXY FOR MAIN CHARACTER 2012
She's got my vote! Roxy is the best of the Alpha kids.