Introduce background spawning with parallax effect (#86)

Co-authored-by: Michal Pikulski <michal.a.pikulski@gmail.com>
Reviewed-on: #86

Assets/Scripts/Core/Settings/SettingsInterfaces.cs

@@ -1,5 +1,6 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 using AppleHills.Core.Settings;
+using Minigames.Airplane.Data;
 using Minigames.StatueDressup.Data;
 using UnityEngine;
 
@@ -344,11 +345,18 @@ namespace Core.Settings
         float PositiveNegativeRatio { get; } // 0-1, where 1 = all positive, 0 = all negative
         float SpawnDistanceAhead { get; }
         float GroundSpawnInterval { get; }
+        float RecencyPenaltyDuration { get; } // Time penalty for recently-spawned prefabs
         
         // Ground Snapping
         int GroundLayer { get; }
         float MaxGroundRaycastDistance { get; }
-        float DefaultObjectYOffset { get; }
+        float FallbackYPosition { get; } // Y position when SnapToGround fails OR when using SpecifiedY mode (universal fallback)
+        float GroundSpawnY { get; }
+        
+        // Default Obstacle Positioning (used when prefab has no PrefabSpawnEntryComponent)
+        SpawnPositionMode DefaultObstaclePositionMode { get; }
+        float DefaultObstacleRandomYMin { get; } // Min Y when DefaultObstaclePositionMode = RandomRange
+        float DefaultObstacleRandomYMax { get; } // Max Y when DefaultObstaclePositionMode = RandomRange
         
         // Debug
         bool ShowDebugLogs { get; }