The full version is about 250 pages...............................................................................But you should definately check on the link.... it seems simple enough to play and as for the science,
well 90% of the game is scientific, but since there still has to be a way to push past the light barrier some of it is not. The point seems to be that before FTL travel was proven the Races of the universe expanded slowly over decades and centuries. Eventually the races began to understand that each star had 2 jump points (one at the north pole and one at the south) Expansion was explosive untill a phenominon know as the hammer (a strange reaction to Jumps that causes psychological trauma) happened. Trade broke down, worlds died and Empires fell. Then some people were found to be immune to the Hammer. You are immune... you have a universe to explore (or whatever)
The mechanics are interesting and involve a system that has characters roll only for failure.