Fix Attached Ice Wall depth

Author: maddie480

Entities/AttachedIceWall.cs

@@ -11,6 +11,7 @@ public static Entity Load(Level level, LevelData levelData, Vector2 offset, Enti
             WallBooster iceWall = new WallBooster(entityData.Position + offset, entityData.Height, left, notCoreMode: true);
             StaticMover staticMover = iceWall.Get<StaticMover>();
             staticMover.SolidChecker = solid => iceWall.CollideCheck(solid, iceWall.Position + (left ? -2 : 2) * Vector2.UnitX);
+            staticMover.OnAttach = platform => iceWall.Depth = platform.Depth + 1;
             iceWall.Get<CoreModeListener>().RemoveSelf();
             return iceWall;
         }