Ok, well I think one issue is you'd overwritten your bootloader with your app by writing to flash. Check out https://www.espruino.com/Bangle.js+Development#using-the-right-hand-side-of-the-ide
You need to reinstall the bootloader then either write to RAM or Storage. Once you've done that, it may fix a lot of things :)
@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.
Ok, well I think one issue is you'd overwritten your bootloader with your app by writing to flash. Check out https://www.espruino.com/Bangle.js+Development#using-the-right-hand-side-of-the-ide
You need to reinstall the bootloader then either write to RAM or Storage. Once you've done that, it may fix a lot of things :)