public static void CreateWalls(GameEngine engine)
        {
            for (int i = 0; i < MAX_COLS; i++)
            {
                engine.AddObject(new WallBlock(new Coordinates(0, i), new char[,] { { '|' } }));
                engine.AddObject(new WallBlock(new Coordinates(MAX_ROWS - 1, i), new char[,] { { '|' } }));
            }

            for (int i = 0; i < MAX_ROWS; i++)
            {
                engine.AddObject(new WallBlock(new Coordinates(i, 0), new char[,] { { '-' } }));
            }
        }
 public static void Init(GameEngine engine)
 {
     PlayerShip ship = new PlayerShip(new Coordinates(MAX_ROWS / 2 - 1, MAX_COLS - 2));
     engine.AddObject(new Enemies.Bomber(new Coordinates(2, 8), new Coordinates(1, 0)));
     engine.AddObject(new Enemies.Charger(new Coordinates(8, 8), new Coordinates(1, 0)));
     engine.AddObject(new Enemies.Horrific(new Coordinates(12, 8), new Coordinates(-1, 0)));
     engine.AddObject(new Enemies.Sinister(new Coordinates(17, 8), new Coordinates(1, 0)));
     engine.AddObject(new Enemies.SuperBoss(new Coordinates(1, 2), new Coordinates(1, 0)));
     engine.AddObject(new Enemies.Horrific(new Coordinates(15, 11), new Coordinates(1, 0)));
     engine.AddObject(new Enemies.Bomber(new Coordinates(2, 11), new Coordinates(1, 0)));
     engine.AddObject(ship);
     CreateWalls(engine);
 }