What is the Piano Tap - See You Again game, how does it work?

According to the introduction of AppStudioSg, Piano Tap - See You Again is a Arcade game on the Android platform. There is currently a 1 version released on Jul 12, 2018, you can see the details below.

See You Again Piano Tap is developed to fulfil everyone's piano dreams.
Don't touch on the white tiles, tap the black tiles to keep the song going.
See You Again is a touching song from the Furious 7 movie and dedicated to Paul Walker.

DISCLAIMER:
See You Again Piano Tap is an unofficial fan application.
It is not affiliated with or endorsed by Wiz Khalifa, or his record label.
This app does not include any copyrighted material.
The piano melodies are arranged with individual piano notes..
For entertainment purposes only.

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.