/// <summary>
/// Allows the game to perform any initialization it needs to
/// before starting to run. This is where it can query for any required services
/// and load any non-graphics related content. Calling base.Initialize will
/// enumerate through any components and initialize them as well.
/// </summary>
protected override void Initialize()
{
base.Initialize();
// Initialize sound engine
GameSound.Initialize();
// Create and set a startup screen...
// If you want to change startup screen,
// change to new FirstStageScreen, etc.
ScreenManager.AddScreen(new MainMenuScreen(), true);
}