The children ghosted in the field was intentional. The hanged man is an invert of some "but not all" tarot designs for this card type. Typically when a tree is used in design for the hangman card it is living while the hanging man or woman is dead.
I like it that you put the hanged man on a tree, it adds the symbolism. You depicted the card quite well by adding those children dancing around the tree while life is standing still for the hanged man. (It reminds me of the story of the Fionavar tapestry).