Upon watching the 2nd episode of the 1st season, about 15 minutes in, there's a scene where Shinku is describing the Alice Game to Hinaichigo. At that point it shows two unknown dolls, apparently have gotten in a fight. The winner then absorbs a Rosa Mystica.

My question is: Would this imply that there had been another Alice Game beforehand? I understand that it could just be a demonstration of the Alice Game, but in that case, why couldn't they use, say, Shinku and Hinaichigo as the example dolls?

And from what I've seen, there isn't anything mentioning that there had or hadn't been an Alice Game before. Any thoughts?

(Link to the episode: http://www.animecrazy.net/rozen-maiden-episode-2/ )

I think it's just a demonstration. From memory, the dolls were pretty generic.

Also, manga didn't have such demonstration.

Im sure its just demostrate, because story says: "The greates dollmaker; Rozen have only did 7 rozen maiden dolls."