private void btnPlay_Click(object sender, EventArgs e)
        {
            try
            {
                if (EmptyNicknameException(txtNickname.Text))
                {
                    //Verifys that text added in the textbox is not empty
                    throw new EmptyNicknameException("Text can't be empty");
                }

                if (MaxCharactersException(txtNickname.Text))
                {
                    //Verifys that text added in the textbox is not more than 15 characters
                    throw new MaxCharactersException("Text can't have more than 15 characters");
                }

                if (WrongCharactersException(txtNickname.Text))
                {
                    //Verifys that text added in the textbox is not a symbol
                    throw new WrongCharactersException("Text can only have alphanumeric and numeric characters");
                }
                string aux = txtNickname.Text;
                try
                {
                    foreach (var player in ControllerPlayer.NicknameList())
                    {
                        if (player.nickname.Equals(aux))
                        {
                            StaticAttributes.nicknameRepeated = true;
                        }
                    }
                }
                catch (Exception)
                {
                    MessageBox.Show("error");
                }
                Game game = new Game(aux);
                game.Show();
                Hide();
            }
            catch (EmptyNicknameException exc)
            {
                MessageBox.Show(exc.Message);
            }
            catch (MaxCharactersException exc)
            {
                MessageBox.Show(exc.Message);
            }
            catch (WrongCharactersException exc)
            {
                MessageBox.Show(exc.Message);
            }
            catch (Exception)
            {
                MessageBox.Show("An error has occurred");
            }
        }