Can I make web interface for hardware events?

...I thought you were using a multiplexed keypad... but to get as quickly as possible to the point of how Espruino works, I wrote the code with simple button. Btw, you can already use your keypad with the above code. You just wire it accordingly:

1. connect middle row of pad with ground
   
2. connect columns to pins
   
   

(btw, I noticed your nice adjustment in the character graphics. Use the Espruino IDE editor to write these character graphics... becaue it has fixed font... and then copy them into the posting text area.)