refactor: re-organize code

include/Player.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <SFML/Graphics.hpp>
+#include <iostream>
+
+using namespace std;
+using namespace sf;
+
+class Player
+{
+public:
+	Player(Vector2u screenSize);
+
+	CircleShape getShape() { return _shape; };
+	void move(int direction);
+
+private:
+	CircleShape _shape;
+
+	int _screenWidth;
+};
+