Could someone tell me what/who exactly the game system is?

SPOILER
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From what I know, Vinter kept rewinding time to save Penelope, so it's most likely his magic. That's why the mirror was what she saw when she got sent here, because our Penelope is a fragment of the original Penelope. That's why he symbolises eternal love

Now I feel even more sad for Vinter T_T

Well that's depressing!

Yep, also why her family in the modern world was literally the same as the one here, the only difference being the absence of Yvonne

Umm whaaaatt

Oomggg now I am DEPRESSED

OH MY GOD I'M CRYING

BISSHHHH I DID NOT SIGN UP FOR THIS ╥﹏╥

OMG THIS MADE CRY, LIKE WTF I LUV HIM SM

EXCUSE ME!?!?! VINTER HE’S SO SWEET WAHHHHH