I am finding a lot of your character commissions very cute looking, especially the toon rendering style and the cartoon anatomy proportions.
About this one, I feel that the arm on the character's left is a little bit awkward to look at in my opinions, believe that it should be counter balancing the leg in some way or other. But it isn't too much of an issue as it is a very nice dynamic pose that has good sense of movement in it.
I think it's the perspective that the pose is at that makes it a bit of a mystery. I really dont see anything wrong with it as I look at it to critique. I agree very cute looking, that's why I faved the otter floating in the water. For this sketch it's the tongue that brings out the cuteness.
I was just feeling that since the character could have been doing a small run up, was feeling that somehow the arms were not reflecting that previous state.
Now that I look at it again, I seem to find that the pose is actually quite workable if it was a kick from a standing pose. As you said, the perspective does leave it to the viewer to work out what is happening so far and it appears that I was erroneous in my interpretation.
PS: Thanks for sharing your own views with me, as it did make me look at it again. Good to see that I am not always "right".