I think there are some problems with new Espruino versions on the HY board I'm afraid (it only boots up sometimes). You could try Espruino 1v44.
Some people were trying to fix this, but it all went a bit quiet.
@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.
I think there are some problems with new Espruino versions on the HY board I'm afraid (it only boots up sometimes). You could try Espruino 1v44.
Some people were trying to fix this, but it all went a bit quiet.