void Init()
{
mainPanel = GameObjectTools.GetComponentInChildren <MainPanel> (gameObject);
playPanel = GameObjectTools.GetComponentInChildren <PlayPanel> (gameObject);
pausePanel = GameObjectTools.GetComponentInChildren <PausePanel> (gameObject);
gameOverPanel = GameObjectTools.GetComponentInChildren <GameOverPanel> (gameObject);
mainPanel.gameObject.SetActive(true);
playPanel.gameObject.SetActive(false);
pausePanel.gameObject.SetActive(false);
gameOverPanel.gameObject.SetActive(false);
mainPanel.Init();
playPanel.Init();
pausePanel.Init();
gameOverPanel.Init();
}