Any easy way to reset the watch without un-soldering the battery?
I entered chess game mode and all buttons other then the backlight are unresponsive.
Is the software side fully functional or is that still in progress? Where can I find more information on operation?

- Press the two top side buttons for a few seconds to enter bootloader mode. You will hear a "laser" sound from the buzzer that indicates that the device is in bootloader./\r\n/ - Press the two lower side buttons. This will exit bootloader and perform a reset. The LCD will show the welcome menu.

The software is still in development, you can see more information on GitHub .

Worked as described thanks:)