Start with the Espruino Pico Button example... Btw, there are already several implementations of Tetris' on forum, for example, Tetris on RGB matrix.
@allObjects started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Start with the Espruino Pico Button example... Btw, there are already several implementations of Tetris' on forum, for example, Tetris on RGB matrix.