The game is not that hard, but you do have to do a bit of work to finish it. It does end as soon as you score above 9690. You must play it a few times to max out the score with your last shot. With that being said, I am not in favor of archiving it.
I have tried it a few times, and no max out score from me yet. I don´t think it is a freebie for 100 points. On the other hand it might be me that is such a bad Space invaders player