protected override void LoadContent()
{
spriteBatch = new SpriteBatch(GraphicsDevice);
Car.LoadContent(Content);
ScoreUI.LoadContent(Content);
GameOverUI.LoadContent(Content);
FPSUI.LoadContent(Content);
CountdownUI.LoadContent(Content);
TitleUI.LoadContent(Content);
//TODO: probably should load ALL content here. Some content (e.g. sign models) still loaded at runtime
}