I absolutely adored the imagery in this story. It was beautiful, unsettling, whimsical, and disturbing all at once. It reminded me of a Studio Ghibli movie.
I loved the ending. It was very bittersweet. It makes me wonder if Cassie and Josie will ever meet again.
What I would recommend is to brush up on your prose. I noticed a few grammar errors and textual inaccuracies. If you're able, I recommend either reading or listening to an audiobook of the original Alice in Wonderland. This story reminded me of it in a lot of ways, and I think that kind of prose could be a good example to look towards.