CheeztBob: "(Press left and right at the same time when you lose or win to retry)" -the instructions below the game
so you actually don't need to move your other arm after the spacebar either..
The game already has music, but what i think FightingYourWar means is that he wants to turn of the SFX(shooting sounds, and stuff like that) so that he can listen to his own music, in iTunes or Winamp. And i agree, i want to listen to the imperial march while i play;)
 "Amberial: Nebulosa Realms"){kind=icon}
 "Starfighter: Disputed Galaxy"){kind=icon}