private void GameLoop(object sender, object e)
 {
     game.update();
     if (game.gameFinished == true)
     {
         gameGoing.Text = "Game Over";
     }
     else
     {
         surviversText.Text   = "Survivers: " + game.survivers;
         killsText.Text       = "Kills: " + game.kills;
         pointsText.Text      = "Points: " + game.points;
         healthText.Text      = "Monster Health: " + game.health;
         towercostText.Text   = "Tower cost: " + game.towerCost;
         towerdamageText.Text = "Tower damage: " + game.damage;
         _gameLoop.Begin();
     }
 }