refactor: Replace hardcoded node paths with constants and remove ScoreComponent.

scripts/UI/GameOverScreen.cs

@@ -1,4 +1,5 @@
 using Godot;
+using Mr.BrickAdventures;
 using Mr.BrickAdventures.Autoloads;
 
 namespace Mr.BrickAdventures.scripts.UI;
@@ -9,14 +10,14 @@ public partial class GameOverScreen : Control
     [Export] public Button RestartButton { get; set; }
     [Export] public Button MainMenuButton { get; set; }
     [Export] public PackedScene MainMenuScene { get; set; }
-    
+
     private GameManager _gameManager;
 
     public override void _Ready()
     {
-        _gameManager = GetNode<GameManager>("/root/GameManager");
+        _gameManager = GetNode<GameManager>(Constants.GameManagerPath);
         RestartButton.Pressed += OnRestartClicked;
-        MainMenuButton.Pressed += OnMainMenuClicked; 
+        MainMenuButton.Pressed += OnMainMenuClicked;
     }
 
     private void OnMainMenuClicked()
@@ -33,7 +34,7 @@ public partial class GameOverScreen : Control
     public void OnPlayerDeath()
     {
         if (_gameManager == null || _gameManager.GetLives() != 0) return;
-        
+
         GameOverPanel.Show();
     }
 }