Yeah, the space mission is no big deal. The ground mission is the tougher one. I did the space mission with all X-Wings on no specific orders... Just set them loose on the galaxy. Looked really cool though. As for the graphics... They're insane. However they built in tons of levels to it, so even someone with such an outdated computer as myself can run it well, even though it does look very much worse.
As for the heroes, that's known as the
Stormtrooper Effect.