Refactor NPC spawning logic and adjust grid size; remove unused power-up type

Assets/Scripts/Core/Domain/GameSession.cs

@@ -1,13 +1,14 @@
 using System;
 using System.Collections.Generic;
 using Core.Ports;
+using UnityEngine;
+using Random = System.Random;
 
 namespace Core.Domain
 {
     public class GameSession
     {
         private const string HighScoreKey = "HighScore";
-        private const float NpcSpawnTime = 30f;
         private const float PowerUpSpawnInterval = 25f;
 
         public int Score { get; private set; }
@@ -15,6 +16,7 @@ namespace Core.Domain
         public bool IsGameOver { get; private set; }
 
         public float TimeDilation { get; private set; } = 1.0f;
+        public float NpcSpawnTime { get; private set; } = 30f;
 
         public event Action<int> OnScoreChanged;
         public event Action<string> OnOrbSpawned;
@@ -28,7 +30,7 @@ namespace Core.Domain
         private readonly Random _rng = new();
         private int _playerFloorIndex = 0;
         private float _timeSinceStart;
-        private bool _npcSpawned;
+        private float _npcTimer;
         private float _powerUpTimer;
 
         private float _timeSlowTimer;
@@ -53,7 +55,6 @@ namespace Core.Domain
         {
             _timeSinceStart = 0f;
             _powerUpTimer = 0f;
-            _npcSpawned = false;
             TimeDilation = 1.0f;
 
             ComboMultiplier = 1;
@@ -67,10 +68,13 @@ namespace Core.Domain
             if (IsGameOver) return;
 
             _timeSinceStart += deltaTime;
-            if (!_npcSpawned && _timeSinceStart >= NpcSpawnTime)
+            _npcTimer += deltaTime;
+            
+            if (_npcTimer >= NpcSpawnTime)
             {
-                _npcSpawned = true;
+                _npcTimer = 0f;
                 OnSpawnNpc?.Invoke();
+                NpcSpawnTime = Mathf.Max(5f, NpcSpawnTime * 0.95f);
             }
 
             _powerUpTimer += deltaTime;
@@ -189,7 +193,6 @@ namespace Core.Domain
             {
                 case 0: type = PowerUpType.LightFooted; break;
                 case 1: type = PowerUpType.SpeedBoost; break;
-                case 2: type = PowerUpType.Hover; break;
                 case 3: type = PowerUpType.TimeSlow; break;
             }
 

Assets/Scripts/Infrastructure/Unity/GameBootstrap.cs

@@ -281,7 +281,8 @@ namespace Infrastructure.Unity
             }
             else if (npcPrefab)
             {
-                Instantiate(npcPrefab, spawnPos, Quaternion.identity);
+                var npc = Instantiate(npcPrefab, spawnPos, Quaternion.identity);
+                npc.Initialize(() => _gameSession.TimeDilation, () => _gameSession.EndGame());
             }
 
             soundManager.PlayNpcSpawn();

Assets/Scripts/Infrastructure/Unity/NpcController.cs

@@ -18,9 +18,11 @@ namespace Infrastructure.Unity
         private Vector3 _currentDir;
         private float _timer;
         private Func<float> _timeDilationProvider;
+        private Action _onPlayerHit;
         
-        public void Initialize(Func<float> timeDilationProvider)
+        public void Initialize(Func<float> timeDilationProvider, Action onPlayerHit)
         {
+            _onPlayerHit = onPlayerHit;
             _timeDilationProvider = timeDilationProvider;
         }
 
@@ -70,5 +72,14 @@ namespace Infrastructure.Unity
                 case 3: _currentDir = Vector3.right; break;
             }
         }
+
+        private void OnCollisionEnter(Collision other)
+        {
+            if (other.gameObject.TryGetComponent<PlayerController>(out var player))
+            {
+                _onPlayerHit?.Invoke();
+                Destroy(gameObject);
+            }
+        }
     }
 }

Assets/Scripts/Infrastructure/Unity/PowerUpViewAdapter.cs

@@ -35,9 +35,6 @@ namespace Infrastructure.Unity
                 case PowerUpType.SpeedBoost:
                     SetColor(EffectColors.SpeedBoostColor);
                     break;
-                case PowerUpType.Hover:
-                    SetColor(EffectColors.HoverColor);
-                    break;
                 case PowerUpType.TimeSlow:
                     SetColor(EffectColors.TimeSlowColor);
                     break;
@@ -79,9 +76,6 @@ namespace Infrastructure.Unity
                 case PowerUpType.SpeedBoost:
                     player.Status.AddEffect(new SpeedBoostEffect(duration, 1.5f));
                     break;
-                case PowerUpType.Hover:
-                    player.Status.AddEffect(new HoverEffect(duration));
-                    break;
                 case PowerUpType.TimeSlow:
                     // Handled globally
                     break;