Today's key (June 13th) has been won.

Mpogoda has won today's free key.  He was the first to send us the correct code for the day which was "keyser  soze".  It was found on the spreadsheet main page next to Dueling Mini Game and read "(c0de is keyser soze).  Congratulations to Mpogoda and good luck to everyone for tomorrow's free key (details here).