[1.2.398] Minar's Past

to my understanding everything of the maple world right now is just a longgggggggg dream of the goddess of time. logically, it'd make sense if the maple world disappear if she wakes up since she doesnt dream about it anymore

To your understanding based on what people have said that has no real grounding in the actual in-game text.
So, yes, it would be logical that the world would disappear if she wakes up... if it was indeed a fact that the Maple World is the product of her dream.

Of course, the fact that the Goddess now appears, sleeping, in the game is a rather large blow to that theory, at least in my mind.
Tell me, when's the last time you had a dream in which you were asleep?