A Tetris game that uses the Impact.js game engine written in JavaScript.

Demo: https://www.ntaso.com/tetris/

Tutorial: https://www.ntaso.com/tutorial-tetris-with-impact-js/

Get the sources, download Impact.js (you need a license), unzip it. You have a folder in there called impact/lib/impact that contains the engine's source code.

Copy it and place it in the Tetris source code under lib/. There's a text file showing the right location.

Have fun.