KoGaMa Land Tycoon marked as Fun Game. Notice how on the top left corner there's a logo, that if you point over, the Fun Game text will be shown as in the picture.
Fun Game is a special place for projects on the Popular Games page. Only games who have won in Weekly Highlights or in Contests can be there. Moderators ocassionally also can give Fun Game for nice games which they like. They will appear at the start of each page, and it doesn't matter the number of players.