This is a simple augumented reality app made with Unity 2017.3 and Vuforia.
To play you need a box (shown below, not included). Position it in the phone camera view. A small cube should appear on the screen above the box. Touch the screen to make it fall on the box. A new one will appear after that. Try to make a tower!
Install Vuforia in the Unity (https://library.vuforia.com/articles/Training/getting-started-with-vuforia-in-unity.html) Build the apk file using Unity.