As @Ganblejs says, if the clock is showing the watch face, you should be able to get to the launcher by pressing the button twice (once to unlock, once to enter launcher).
If that doesn't work, does the clock face keep updated with the current time?
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.
As @Ganblejs says, if the clock is showing the watch face, you should be able to get to the launcher by pressing the button twice (once to unlock, once to enter launcher).
If that doesn't work, does the clock face keep updated with the current time?