You're using Google Play, so I'm assuming you're on Android. The game only supports Snapdragon 835 and 845 chipsets. Here's the post: https://www.helloneighborgame.com/forum/hello-neighbor-mobile/supported-android-devices
Make sure your phone is on one of those lists. If it is, then I don't know what to tell you.
How do you join the testing program?
It s chose randomly . To the registered email