private void backBtn_Click(object sender, EventArgs e)
 {
     this.Hide();
     LevelManager levelmngr = new LevelManager();
     levelmngr.ShowDialog();
 }
 //Level Manager
 private void levelMngrBtn_Click(object sender, EventArgs e)
 {
     LevelManager levelManager = new LevelManager();
     levelManager.Show();
 }