I've just realised that if you click the "see more" button, you'll get a more detailed leaderboard :D
I don't have any idea how the score is calculated but looks interesting.

Yes, there was another thread about this some time ago, but it's not clear how they assign the score, it seems to vary completely randomly.

I just hit 1301 pts, yeeehaw!

hah, with some stats i just go like " boy, i hope you guys are game reviewers, retired or suffer from some disablity that prevents you to lead a normal working life "

but no serious, 100% and legendary achievements rate high towards your total score