This looks great
I had a few thoughts in mind, I don't know if they even qualify as critique... just.. er, thought
ALRIGHT, here we go: Firt of all I thought the bear looks more like a polarbear, because of the straight nose-line... then again you wrote white bear so I guess that does not matter
My second thought was (this could actually count as some sort of critique) that you could work on te bodily proportions of the girl, the head is quite large compared to the body etc. If you meant for it to stay rather cartoonish it's really good though!
Oh, there's more! They both look a bit sad, as if they were to leave each other, so I myself would place the girl's hands so that they would seem to be grabbing the bear, as if she doesn't want to let go. Oh, so sad.. *cries*