I should add that as in the post above, you can effectively disable the button in software so assuming you can upload the code fast enough after boot up you can make the watch semi-usable, and then it would be possible to make the accelerometer 'tap' call the handlers for when the button is pressed.
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.
I should add that as in the post above, you can effectively disable the button in software so assuming you can upload the code fast enough after boot up you can make the watch semi-usable, and then it would be possible to make the accelerometer 'tap' call the handlers for when the button is pressed.