private void label4_Click(object sender, EventArgs e)
 {
     this.Visible = false;
     using (Options o = new Options())
         o.ShowDialog();
     this.Visible = true;
 }
        private void MainMenu_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyData == Keys.Enter)
            {
                if (labelindex == 0)
                {
                    Program.startgame = true;
                    this.Close();
                }
                if (labelindex == 1)
                {
                    using (Process proc = Process.Start(start))
                    {
                        proc.WaitForExit();
                    }
                }
                if (labelindex == 2)
                {
                    this.Visible = false;
                    using (Options o = new Options())
                        o.ShowDialog();
                    this.Visible = true;
                }
                if (labelindex == 3)
                {
                    this.Close();
                }

            }

            if (e.KeyData == Keys.N )
            {
                Program.startgame = true;
                this.Close();
            }
            if (e.KeyData == Keys.Escape || e.KeyData == Keys.E)
            {
                this.Close();
            }
            if (e.KeyData == Keys.O)
            {
                this.Visible = false;
                using (Options o = new Options())
                    o.ShowDialog();
                this.Visible = true;
            }
            if (e.KeyData == Keys.Up)
            {
                if (labelindex > 0)
                {

                    ChangeLabelIndex("+");
                }
            }
            if (e.KeyData == Keys.Down)
            {
                if (labelindex != buttonlist.Count - 1)
                {

                    ChangeLabelIndex("-");
                }
            }
        }