.

Game/Level/CurrentLevel.cs

@@ -1,13 +1,22 @@
 using GodotHostTest.Interfaces;
+using R3;
 
 namespace GodotHostTest.Game.Level;
 
 public class CurrentLevel : ICurrentLevel
 {
-    public int LevelNumber { get; private set; } = 1;
+    private readonly ReactiveProperty<int> _levelNumber;
+
+    public CurrentLevel()
+    {
+        _levelNumber = new ReactiveProperty<int>(1);
+        LevelNumber = _levelNumber.ToReadOnlyReactiveProperty();
+    }
+
+    public ReadOnlyReactiveProperty<int> LevelNumber { get; }
 
     public void NextLevel()
     {
-        LevelNumber++;
+        _levelNumber.Value++;
     }
 }