Thank you for letting me know! I'm fairly new to the Jetpunk community, so I didn't know that that challenge existed. Could you send me a link if there is one, or should I be able to find it easily?
Not particularly, they are all well known. Some are more famous than than others of course, but I'd say that's unavoidable and good for a quiz anyway. Actually, maybe there's room to include a couple of slightly more obscure ones if you make a sequel to challenge movie buffs... :)