Счёт, интерфейс и повторный запуск

using Reckfell;

public partial class SquashHud : CanvasLayer
{
    [Signal] public delegate void StartRequestedEventHandler();
    private Label _score = null!;
    private Label _message = null!;
    private Label _instructions = null!;
    private Button _button = null!;

    public override void _EnterTree()
    {
        _score = GetEntity<Label>("Root/ScoreLabel");
        _message = GetEntity<Label>("Root/MessageLabel");
        _instructions = GetEntity<Label>("Root/InstructionsLabel");
        _button = GetEntity<Button>("Root/StartButton");
        _button.Pressed += OnPressed;
        _instructions.Text = L("WASD / стрелки · Space — прыжок", "WASD / arrows · Space to jump");
    }

    public override void _ExitTree()
    {
        if (ReckfellObject.IsInstanceValid(_button))
            _button.Pressed -= OnPressed;
    }

    public void SetScore(int score) => _score.Text = L("Счёт: ", "Score: ") + score;
    public void ShowReady() => ShowMessage(L("Прыгайте на противников сверху", "Jump onto hazards from above"), L("Начать", "Start"));
    public void ShowGameOver() => ShowMessage(L("Игра окончена", "Game over"), L("Ещё раз", "Restart"));

    public void ShowPlaying()
    {
        _message.Hide();
        _button.Hide();
    }

    public void ShowSetupError()
    {
        ShowMessage(L("Проверьте Prefabs/Mob.rprefab", "Check Prefabs/Mob.rprefab"), "");
        _button.Disabled = true;
    }

    private void ShowMessage(string message, string buttonText)
    {
        _message.Text = message;
        _message.Show();
        _button.Text = buttonText;
        _button.Show();
    }

    private void OnPressed() => EmitSignal(SignalName.StartRequested);
    private static string L(string ru, string en) => TranslationServer.GetLocale().StartsWith("ru") ? ru : en;
}