What is the Amazing UNO Demo game, how does it work?

According to the introduction of scal83, Amazing UNO Demo is a Card game on the Android platform. There is currently a 0.12Demonstration version released on Feb 22, 2020, you can see the details below.

Come to discover or rediscover the "UNO" game. This version is out of the ordinary, the rules and maps are configurable, no other UNO game offers such configurations. Alone or between friends, this application promises you parts rich in emotions.

Optimization of objects placement, libraries updated