Playing hard to get or mixed signals?? Girls Please?

[D]

So I went out on a date with this girl that I hadn't seen in 2 years. We used to be cool with each other as far as I can remember. So we went out and talked and caught up, the date went pretty well as far as I can see. In the week leading up to the date we would text at least once a day and she would send me snapchats and whatever. After the date...nothing. I tried calling her to invite her out again and I texted her twice but no response. But nevertheless she still likes my instagram pictures and always checks my snapchat lifes and sends me snap chats once in a blue moon. Please! What should I do if she is playing hard to get, how can I play this game so I can win?