As an experiment I increased the brightness and contrast a bit on the child and then used unsharp masking in order to darken and crispen her up. That seemed to help fit her into the scene better. It was just a quick test, so you might find that playing with the saturation, etc. might work even better. I think also the mushrooms in the upper left of the image need to re-placed because they seem to be lit from a different angle than their adjacent objects. Other than that I think it's a very good surreal, dreamlike image.