I used to play it randomly from ~97-99 and at one point I know I was very good at it, but I have no recollection of what the scores were. If I had to guess they were in the 110-130million range.
I just stopped an played a couple games and got around 2-4million each and know there were absolutely no where near as good as when I was at my peak, I could see the strategies I used before, but just couldn't seem to utilize them. Its all about working series and gaining ranks, and getting extra balls wasn't too difficult (I think you could get unlimited extra balls, if not at least 2 per playing ball). I recall games going for the better part of an hour before, this time they slipped by in just a few minutes. As I recall, there is a way to score 30-something million in the first 2 minutes.
Searching the web trying to remember some of this stuff,
http://www.rdrop.com/~half/General/Game ... cadet.html is exactly what I remember. Funny how I never knew there were cheats though (just found that out through seach...
http://www.actiontrip.com/cheats/3dpinb ... adet.phtml )
And the game was actually created as a 3d game by Maxis in '95, but as leileilol stated, its first 2d counterpart appeared in the Windows 95 Plus! pack.