This is a game created by Unity3d.
Based on the tutorials I found online, I have created this game which is similar to the original Tetris game.
I have also uploaded a WebGL version to itch.io.
Unity version : 2018.3.0f2
Youtube Demo Link : https://www.youtube.com/watch?v=JphC8rd-zYc
Itch.io WebGL Link : https://hamstersophia.itch.io/tetris-replica