Good job!
Don't forget about Ruby!
Only thing I want to say: When I look at Ducky and Spike, Ducky's sharp green color hurts an eye a little, in contrast with good colored Spike next to her, with more "natural" skin color. The same with Ali's sharp color.
Plus I duno, if it is intentional, but Spike also looks... hmm, as if he was drawn and colored on paper for actual cartoon or book, in contrast with Ducky, and it makes him even better!