The game has been published nearly a week ago, and the score boards are not empty anymore. I did not expect on this as I haven't put any effort into the marketing, I did not put up even an image as an announcement about the release.
So a big thanks for everybody, who somehow figured out that this game exists and play it! Considering that this is just the core part of the whole game, it is not that bad result after a week. Thanks guys, seriously, you are great :)