This is not something set up to compare your score to the score of other players.  At present it will come up at the end of each game you finish and give you a numeric ranking score, but it is disabled.  That is, it doesn't save your score for comparison to previous games you have played.  There are at present three NPC rankings listed.  One of them is Janus with a score of zero.  Almost all the games I have played have crashed and so I don't know if the ranking is adjusted for game difficulty.