Me and my W went through this during our separation.
It's quite normal for her to act this way, her own emotions are probably all over the place, and yes there is some game playing involved as she is testing to see of she still has you.
It's really a fine balance she needs to understand the decision she made could be permanent, while at the same time believing she can return to a fixable marriage.
Beg too much and she won't believe she is returning of her own will, act too aloof and she will believe that there really is no hope for the marriage because you have now moved on.
So let her initiate and return any and all affection, when she acts out ignore her. It's hard to say but as a basic rule of thumb if she shows some positive signs return 85% to 95% back. This way she can see that there is still hope for you two but her actions if continued will take a toll on the relationship.
Hope that helps, and keep posting even if it's only about your mood.
