Tetris
A tetris clone I made years ago (~2013).
For the most fun, be sure to turn on the music on the settings page. (Music: Sabrepulse - The Fourth Sequence.)
The scoring has lots of bonuses for speed, sprees, multiple rows, etc.
Tech
ES5, RequireJS, jQuery, Canvas, plain CSS.
Usage
Just open tetris.html from the filesystem. Preferably in Chrome.
Or you can just try it out here without downloading.