private void rd_Bttn_Easy_CheckedChanged(object sender, EventArgs e)
        {
            int diff = 1;

            Select_Level.startGame(diff);
            this.Close();
        }
        private void rdBttn_Difficult_CheckedChanged(object sender, EventArgs e)
        {
            int diff = 3;

            Select_Level.startGame(diff);
            this.Close();
        }
        private void newGameToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //TO-Do: I need to check if level of the game has been selected before the form redirects to the game board.
            this.Hide();
            Select_Level select_Level = new Select_Level();

            select_Level.Show();
        }