Your wings need to be consistent in size. On both figures, the wings on the left are larger than the wings on the right...

I agree with Mos- this is cute, though. I'm sure it's the first step to something like this:
http://www.freewebs.com/vilemessiah/luis_royo_fallenangelI.jpg

To MossyB: They're not facing directly to the "viewer" so one side of their body is turned away so the wing should be smaller no? O.o

and WOW greymval, I love that drawing you link. :O

Fantastic cute work author...I like the in-perfection of wings and their great pose...best of luck author

Thank you!!