LeninEyes

class LaserEyes
{
    [SerializedField] private TetrisGrid _tetrisGrid;
    private ParticalSystem _particalSystem;

    onEnebled
    {
        _tetrisGrid.LeninEyesSwitched += OnLeninEyesSwitched;
    }

    onDisabled
    {
        _tetrisGrid.LeninEyesSwitched -= OnLeninEyesSwitched ;
    }

    Start
    {
        _particalSystem = GetComponent<ParticalSystem>();
    }

    OnLeninSwitched (bool switched)
    {
        if(switched)
            _particalSystem.Play();
        else
            _particalSystem.Stop();
    }
}

class TetrisGrid
{
    private ControllableFigure _controllableFigure;

    onEnebled
    {
        _controllableFigure.LeftBorderCrossed += OnLeftBorderCrossed;
    }

    onDisabled
    {
        _controllableFigure.LeftBorderCrossed -= OnLeftBorderCrossed;
    }

    ...
    StartFigure
    {
        var figure = ...
        ...
        _controllableFigure = figure;
    }

    ...
    OnleftBorderCrossed(bool crossed)
    {
        Invoke?.LeninEyesSwitched(crossed)
    }
}

class ContorollableFigure
{
    ...
    {
        Invoke?.LeftBorderCrossed(bool);
    }
    ...
}