void Start()
{
instance = this;
// cache references to our player and level manager objects
player = GameObject.FindObjectOfType <PlayerControl>();
levelManager = GameObject.FindObjectOfType <LevelManager>();
// cache some references to various menu screens and so on
menuSystem = GameObject.FindObjectOfType <MenuSystem>();
mainMenu = menuSystem.GetScreen("MainMenu");
pauseMenu = menuSystem.GetScreen("PauseMenu");
restartMenu = menuSystem.GetScreen("RestartMenu");
storeMenu = menuSystem.GetScreen("StoreMenu");
screenFade = GameObject.Find("ScreenFade").GetComponent <CanvasGroup>();
infoPopup = GameObject.FindObjectOfType <InfoPopup>();
// find our full screen effects
motionBlur = GameObject.FindObjectOfType <CameraMotionBlur>();
screenBlur = GameObject.FindObjectOfType <BlurOptimized>();
// start with the screen fader opaque
screenFade.alpha = 1.0f;
creditMultiplier = 1.0f;
CheckShopItemIDs();
InitFullscreenEffects();
OnEnterStateMenus();
}