Mechanic vice I like the fact that your skill level determinate what you can re-roll. This is quite clever solution and players that enjoy rolling lot of dice will enjoy it. It also keeps up the tension when you can always hope for success or at least poor enough roll for re-roll. Idea that each obstacle has only one solution fights against my personal rpg ideology.
Setting is your out-of-the-mill low sci-fi setting. There is nothing wrong with it but there is nothing excitingly new either. Scenario is also little dull where space heroes haul good through lawless wilderness without bigger motivation than wealth and fame. These are both fine but they have been used so many times before.
Overall the best part is mechanics and other parts are fine.