Free Tetris tutorial with sources C# Arrays 280 lines of code

Do not use Unity specific things like colliders or raycasts. Suiltable for any c-like languages ( Java, C++ ). Can be transformed into any type of visualisation WinForms, Console, Canvas

Language: russian, but you can download sources as well.

Detailed explanation with step by steps here

http://doctrina-kharkov.blogspot.com/2017/11/kak-napisat-tetris-c-sharp-unity-1.html

 

Thanks