the drawing test in last two weeks,test1

here is the part one movement test. i draw it using pencil on paper.  i think the movement at beginning  is  all right but when the yinyan separate transform to the man and the girl is not very good. After i talk with Matthrew, he gave me a good suggestion. The problem is when the two part separate the both head  it doesn't move follow a arc. so the movement up down, up down. so i need to change a little bit to make the movement smooth.