Using Puck as a single button keyboard

Yes, that looks good. Try:

• Make sure Puck.js is on the 1v92 firmware
  
• Connect with the Web IDE on your Mac
  
• Program the code above
  
• Disconnect from the IDE on the Mac
  
• Make sure you follow these instructions: http://www.espruino.com/Puck.js#i-can-t-reconnect-to-my-puck-js-on-mac-os
  (If you'd used the Puck as a HID device n your Mac it's very likely that your Mac is repeatedly connecting to Puck before Windows can do it)
  
• Connect via the Bluetooth Pairing menu on your Windows PC. The keyboard icon should appear to the left of it and it'll start working