That clarifies a few things for me that were confusing in the Babel Fish translation.

AI's rate of difficulty could be adjusted
The AI is changeable - but it's tied to the ball speed. I didn't have any bits of RAM left to make it separate. Yep, bits - with only 128 bytes of RAM ever bit counts :)

Positive              Negative\n* Gaming fun for up        * Unfortunately playable\nto four players            only with paddles

That part's a bit odd - the only way to have a concurrent four player game on the 2600 is with paddles.

It's 22nd out of 162 on their listing by score

I should have clarified - I was looking at the [link|http://www.planet-atari.de/?p=article&platform=Atari%20VCS%202600&wertung=1|2600 listing by score]