He must have wanted it to be cracked. Password is just too apt, too easy for this community.
Not a proof that he intended to stay anonymous though, maybe he hadn't expected NSA and friends to give him a phone call.
EDIT: Well, at least this will discourage him from designing more "fun" games for now One warm, bright day, when NSA becomes irrelevant...
EDIT 2: No, there still is a way for him to prove identity: through his bitcoin account 1BCN1ugdKdWd9pQ8Am9hMhtHZfmbXzxE8a