The Typing of Emacs is a fast speed typing game, based on the game Typing of the Dead. In the game, one has to type in the word that appears, under a time limit. If one enters a wrong word, or does not successfully complete the word, the player loses one life. The game ends when the player loses three lives.
The game reads all open buffers to find words for the game. This makes it versatile, as one can use it to practice typing any language, programming or otherwise.
To configure it to use on english words, simply open /usr/share/dict, or its equivalent in your OS, and run the game.