Twilio Functions and Programmable SMS are used to deploy a word game called BalderText, which challenges players to write convincing definitions for uncommon English words. The game can be played with 2-8 players, and the player with the most points after three rounds wins. To deploy the game, users need to clone a repository from GitHub, install dependencies, and configure their Twilio account credentials. Once deployed, players can join the game by texting 'Join game' followed by their username, and then participate in gameplay by submitting fake definitions for a word and voting on which definition they think is the real one. The game supports commands such as 'Start game', 'End game', and submitting votes or definitions, and users can customize the experience by contributing to the GitHub repository.