// Pauses game and shows overlay
public void Pause()
{
if (!gameIsPaused)
{
gameIsPaused = true;
Time.timeScale = 0.0f;
interfaceController.ActivatePauseOverlay();
}
else
{
gameIsPaused = false;
Time.timeScale = 1.0f;
interfaceController.DeactivatePauseOverlay();
}
}