You could unsolder the built-in switch, however the Puck has lots of IO pins on it so you can pretty easily add other switches to it if you wish.
There is some info at http://www.espruino.com/Button although it is not specifically for Puck.js - but the jist of it is you just need to attach 2 wires, and that's it.
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.
What did you have in mind?
You could unsolder the built-in switch, however the Puck has lots of IO pins on it so you can pretty easily add other switches to it if you wish.
There is some info at http://www.espruino.com/Button although it is not specifically for Puck.js - but the jist of it is you just need to attach 2 wires, and that's it.