This is very interesting and unique. Watching the shadows that mobiles like this create always adds an extra dimension to the artwork, but by inverting the colours you've made the shadow the subject in its own right. Nice idea.
Interesting interpretation of shadows. It is a really nice shade of blue. the intersecting corners kinda distracts me, but it was an interesting choice of subject matter.
This is the negative of your original photo, right? Well, I like it. I like the idea of taking a photo of a mobile anyway (I have two at home and tried, but didn't get a good shot to submit). Turning it into a negative has a cool effect. Are you getting comments that this is not a shadow?
An inversion, very creative, the realists on this site are going to rake you over the coals for that. Color manipulation as well? Don't be suprised if your ratings average is low, but in my book, one of the top ten.
Cool blue! (Inverse colors?) Nit: lower center has a distracting oval, extraineous light shadow, along with another one starting at the lower right corner, extending up past the lower part of the mobile's shadow. (Maybe a bit overly blue....) Photo 6 Creativity 8 Shadows 7 total 7