Hello Flladi,
You know, I really like where you are going with this. What does not work for me is the composition. Your little one looks like she might topple off the canvas. It is an odd pose and looks off balance. While "off balance" is appropriate for babies most of the time in real life, it isn't working (for me) in this painting.
I know you might hate to do this, but I will recommend to you that you consider cropping it down to the midsection, showing both of the hands. You will still get the "zipper concept" and it will look more balanced both as a piece and a pose.
I did a little work with it in Photoshop just as a suggestion. Attached below:
