Topic, Questions to someone

  Or, you could make a forum for an unofficial contest

  You need the permission of jp.
If you'd make a contest topic, nobody would get a medal (if jp didn't allow you).

  So i can create a new topic with the name of the contest?

  Yeah, contests aren't really a "feature".
There's only a topic and people make levels to the theme of the contest.
After the votes jp gives a medal to the winner.

  You can't make a contest, only site moderators can, well actually only jp can. But you can make suggestion on the forum.

  If you didn't know something in BL ask a Question to someone.

How to create a contest?