Possible startapp integration error

Hi, I have uploaded an app to Google Play and it has about 30 downloads but in startapp dashboard it shows it has non. does it mean I have integrate the startapp sdk wrong or what? But I have 400 ad impressions? Can you please explain this to me? Revenue is also 0. Thanks! Game https://play.google.com/store/apps/details?id=com.Chillapps.Reaction_Test