extern struct bangdots bdot[MAXBANGDOTS], *bdotptr;
extern struct spacedot sdot[MAXSPACEDOTS];
+// command-line arguments
+extern int opt_fullscreen;
+extern int opt_sound;
+extern int opt_music;
+extern float opt_gamespeed;
+extern int opt_tail_engine;
+extern int opt_friction;
+
// Other global variables
extern char topline[1024];
extern char *initerror;
extern int nships,score,initticks,ticks_since_last, last_ticks;
extern int gameover;
extern int maneuver;
-extern int sound_flag, music_flag;
-extern int tail_plume; // display big engine at the back?
-extern int friction; // should there be friction?
extern float fadetimer, faderate;
extern int pausedown, paused;