Secret

I could add that you should add sparkle and highlights to her dress (near the compositional mark at the bottom)? And grounding her better (some twiggy detail in front of her somewhere would establish her better in the space I think) would help her feel more solidly at home up in the trees.

I love this. Her expression and pose, the movement within the frame (all those swoopies look fun..) and the composition is beautiful. You could add a third color (more bluey turquoise in the far background would be nice or orangey reds in the foreground would work too...) to make the dimensionality more complete... cool colors in the background push a body forward, same as warm colors on foreground objects.

Wonder what's up next?