Google sorts at popularity, IE, how much links it can find to the website. If every website linked J2O it would rank highest.
Sadly, this also means things like review sites get the highest ranks, because so much people know Gamespot.

Jazz2Online also is on dmoz.org, which is good.. saddly they did not give us a recommendation star. :P
Dmoz.org is supposed to feed Google, but apperently that doesn't work. Probably because the category in which JazzJackrabbit resides is "Jazz Jackrabbit Series" instead of "Jazz Jackrabbit 2"

On a side note, they are asking for an editor at the DMOZ page. If you want to maintain a JJ2 link section on one of the most popular Internet databases...