-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;