title: How to upload an APK for alpha test?
body: <p>I am trying to submit my almost finished game (first app) to the alpha testing but after hours of research I still can´t.</p>
  
  <p>Inside the Google Play Development console / Game services in the "Testing" tab I filled my alpha testers list but after that there is only 2 switches, there is no "APK" tab like the tutorial said and no "upload" button.</p>
  
  <p>In the "publish" tab it says "ready to publish" which is odd since I haven't uploaded any APKs yet, I wonder what will it publish if I click it. I don't want make mistakes here since published apps can't be deleted as far as I know.</p>
  
  <p>Finally the weirdest thing is that in the upper tab "all applications" it says "you don't have applications" while in the "linked apps" tab the game is in the list.</p>
  
  <p>What am I doing wrong? I know that for someone who already publish an app this would be extremely obvious but not for me please help.</p>