//save and show updated highscore list
private void btnSaveScore_Click(object sender, EventArgs e)
{
highScore.CalculateScoreAndStore(game.Moves, seconds, txtEnterName.Text);
PopulateHighScoreList();
//hiding controls after entering highscore name
txtEnterName.Text = "";
lblenterName.Visible = false;
txtEnterName.Visible = false;
btnSaveScore.Visible = false;
}