I don't think it will cause any problems if you post the link, as long as you aren't just advertising something you made or something like that. That or if it is something that could be considered competition for WiiChat, and I highly doubt that a flash game would be competition. So go ahead and post the link, and if a mod thinks different then they will say something, but I doubt they will.
Edit: I will just put the link, so if anyone gets in trouble it will be me. Well here it is. Its very weird yet oddly addictive.