-extern int score, distros, level, next_level, game_pause, quit, score_multiplier, endpos, counting_distros, distro_counter;
-extern timer_type super_bkgd_timer;
-extern float scroll_x;
-extern int frame;
-extern bouncy_distro_type *bouncy_distros;
-extern broken_brick_type *broken_bricks;
-extern bouncy_brick_type *bouncy_bricks;
-extern bad_guy_type *bad_guys;
-extern floating_score_type *floating_scores;
-extern upgrade_type *upgrades;
-extern bullet_type *bullets;
-extern int num_bad_guys;
-extern int num_bouncy_distros;
-extern int num_broken_bricks;
-extern int num_bouncy_bricks;
-extern int num_floating_scores;
-extern int num_upgrades;
-extern int num_bullets;
-extern player_type tux;
-extern texture_type img_box_full, img_box_empty, img_mints, img_coffee, img_super_bkgd, img_red_glow;
-extern timer_type time_left;
-extern double frame_ratio;
-
-void add_score(float x, float y, int s);
-void set_defaults(void);
-void arrays_init(void);
-void arrays_free(void);
-
-void add_bouncy_distro(float x, float y);
-void add_broken_brick(float x, float y);
-void add_broken_brick_piece(float x, float y, float xm, float ym);
-void add_bouncy_brick(float x, float y);
-void add_bad_guy(float x, float y, int kind);
-void add_upgrade(float x, float y, int kind);
-void add_bullet(float x, float y, float xm, int dir);