Press the button as many times as you can in 30 seconds.
Uses Google Play Games Services leaderboard and achievements with working Popup for login and unlocks.
TapAttack takes the Get Started With Google Play Games Services tutorial from Ashraff Hathibelagal and combines it with the TypeANumber tutorial from Google.
TapAttack is a very simple, single Activity and single Layout, Android application example.
This example is now available in both Java and Kotlin. Edit the Android Manifest and layout file to switch between versions.
If I can be of any help: Michael Dodd