Nice job! You have put a whole system in one page and still have plenty of space left. I would use that to add some lore to flesh out the universe and make it more appealing.
A couple of notes:
The vehicle rules, as they are the same as the character's ones, probably could be reduced to a couple of notes in the main rules and add some more vehicle/enemies.
The 3d6 occupation table means that, if chosen randomly, most characters will be either marines or merchants.