You might have heard that every picture looks different for every person.
For me, the perspective is wrong, flapper and head are reversed perspective-wise. For you it might be completely fine.
By the way, yes, there are rules how background and foreground work. You can follow them or not, but the human eye will notice it. Since you add a strong black line as border, the rather weak in tone flapper will vanish, disappear and it will, for some people, look as if there is only a head and the rest is background glow.