diff --git a/seminar13_polymorphism/arkanoid/arkanoid.cpp b/seminar13_polymorphism/arkanoid/arkanoid.cpp
index 1e3c557..c7be89f 100644
--- a/seminar13_polymorphism/arkanoid/arkanoid.cpp
+++ b/seminar13_polymorphism/arkanoid/arkanoid.cpp
@@ -2,9 +2,9 @@
 #include <SFML/Graphics.hpp>
 #include <list>
 #include <cmath>
+
 #include "arkanoid.hpp"
-#include "ball.hpp"
-#include "paddle.hpp"
+#include "bonus.hpp"
 
 const double pi = 3.14159265358979323846;
 
diff --git a/seminar13_polymorphism/arkanoid/arkanoid.hpp b/seminar13_polymorphism/arkanoid/arkanoid.hpp
index b753c1d..8ba2996 100644
--- a/seminar13_polymorphism/arkanoid/arkanoid.hpp
+++ b/seminar13_polymorphism/arkanoid/arkanoid.hpp
@@ -1,9 +1,10 @@
 #pragma once
 #include <list>
+
 #include "ball.hpp"
-//class Ball;
 #include "brick_grid.hpp"
-#include "bonus.hpp"
+#include "paddle.hpp"
+class Bonus;
 
 class Arkanoid
 {
diff --git a/seminar13_polymorphism/arkanoid/ball.cpp b/seminar13_polymorphism/arkanoid/ball.cpp
index 2936661..a5d7f7f 100644
--- a/seminar13_polymorphism/arkanoid/ball.cpp
+++ b/seminar13_polymorphism/arkanoid/ball.cpp
@@ -1,5 +1,7 @@
 #include <cmath>
 #include "ball.hpp"
+#include "brick_grid.hpp"
+#include "paddle.hpp"
 
 // Вспомагательные функции для работы с векторами типа sf::Vector2f
 float operator*(const sf::Vector2f& first, const sf::Vector2f& second)
diff --git a/seminar13_polymorphism/arkanoid/ball.hpp b/seminar13_polymorphism/arkanoid/ball.hpp
index 813f4aa..2bca550 100644
--- a/seminar13_polymorphism/arkanoid/ball.hpp
+++ b/seminar13_polymorphism/arkanoid/ball.hpp
@@ -1,6 +1,9 @@
 #pragma once
-#include "brick_grid.hpp"
-#include "paddle.hpp"
+#include <SFML/Window.hpp>
+#include <SFML/Graphics.hpp>
+
+class BrickGrid;
+class Paddle;
 
 struct Ball
 {
diff --git a/seminar13_polymorphism/arkanoid/bonus.cpp b/seminar13_polymorphism/arkanoid/bonus.cpp
index 62e99fc..d6cc064 100644
--- a/seminar13_polymorphism/arkanoid/bonus.cpp
+++ b/seminar13_polymorphism/arkanoid/bonus.cpp
@@ -1,9 +1,9 @@
-#include <SFML/Window.hpp>
-#include <SFML/Graphics.hpp>
 #include <cmath>
 
 #include "bonus.hpp"
 #include "arkanoid.hpp"
+#include "ball.hpp"
+#include "paddle.hpp"
 
 const double pi = 3.14159265358979323846;
 
diff --git a/seminar13_polymorphism/arkanoid/bonus.hpp b/seminar13_polymorphism/arkanoid/bonus.hpp
index b10c606..221e4c5 100644
--- a/seminar13_polymorphism/arkanoid/bonus.hpp
+++ b/seminar13_polymorphism/arkanoid/bonus.hpp
@@ -1,6 +1,8 @@
 #pragma once
-#include "paddle.hpp"
-#include "ball.hpp"
+#include <SFML/Window.hpp>
+#include <SFML/Graphics.hpp>
+class Paddle;
+class Ball;
 class Arkanoid;
 
 class Bonus