early build =/= full finished game

Well, you did get a response - they are not accepting games in early access, beta or demos. Pointing the finger at other games on the site won't help, as those games were probably added in the past before the current rules came in place.

Like Oreo said, you did get a response. You're free to have your own community ran leaderboards like several communities have done in the past (and some still do).