The core elements of the GDD seems a bit unfinished from the looks of it and certain sections are either reexplaining some information, going into too much detail, or being just a bit vague so the overalls clarity is rather low.
I'd also say that the theme dosen't seem that unique falling into an action adventure game with puzzles and struggling against a very unique mechanic that does seem really fun I have to admit.
With all that criticism being said I really enjoy the concept and think if you had more time to flesh this idea out and work on it some more, this would be a really competent GDD and be a super cute game I'd love to get my hands on to play.