There's now a tutorial on how to modify menus and things yourself at https://www.espruino.com/Bangle.js+Modification
@Gordon 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.
There's now a tutorial on how to modify menus and things yourself at https://www.espruino.com/Bangle.js+Modification