In this instance, to see if humans are capable of adding additional limbs to their form and keep all functioning in the same way. Gems can do that, easily and naturally, and so I have my doubts an inferior species like humans would be able to do the same, but I don't want to write out the possibility of it without encountering it first hand.

[So... "because she can." Essentially.]

What do you mean? I know there's more than that here. But that room so far is the most interesting thing I've encountered while being stuck here, so until the game finishes when someone beats a boss, that is where I intend on spending my time.