added spider casings back

scripts/spider.gd

@@ -178,6 +178,7 @@ func spawn_casing():
 	instance_casing.position = casing_ejector.global_position
 	instance_casing.transform.basis = casing_ejector.global_transform.basis
 	instance_casing.player_velocity = velocity * transform.basis
+	get_tree().get_root().add_child(instance_casing)
 
 func dying_throws():
 	dying = true