De-saturated Background Colors for Children's Book Cover Image

I had a few moments today to play with the brightness and color saturation of my book’s cover image. I’m tweaking the colors to see if I can get the figures to pop out of the page a little. I’m wondering if I have already overworked this image. Is it time to cool my jets a little? Is it time to self-edit?

BTW, look at the Futura font’s awesome question mark: ?. That’s awesome.

View fullsize