E.T., the Atari 2600 Video Game

Now I know for sure that the E.T. game was written by the same guy that did Yars' Revenge, which makes sense considering that when I played E.T. years ago I must've come across an Easter Egg that had Yars fly out of one of the pits that E.T. fell into. I haven't seen or heard any reference to anyone else finding this, though.