/// <summary>
/// LoadContent will be called once per game and is the place to load
/// all of your content.
/// </summary>
protected override void LoadContent()
{
spriteBatch = new SpriteBatch(GraphicsDevice);
font = Content.Load <SpriteFont>("font");
MenuScreen.LoadContent();
LevelSelectScreen.LoadContent();
CreditsScreen.LoadContent();
LevelScreen.LoadContent();
LevelEndScreen.LoadContent();
ChangeScreen(MenuScreen);
}