Tweaks to survival mode with spawn chances.

src/level.py

@@ -437,6 +437,7 @@ class Level:
             damage=damage,
             attack_range=attack_range,
             speed_multiplier=speed_multiplier,
+            attack_pattern={"type": "hunter"},  # Hunt like original spiders
         )
         self.enemies.append(enemy)
 

src/survival_generator.py

@@ -131,17 +131,31 @@ class SurvivalGenerator:
             levelData["weapon_sound_overrides"] = self.weaponOverrides
 
         # Calculate spawn rates based on difficulty
-        collectibleDensity = max(0.1, 0.3 - (difficultyLevel * 0.02))  # Fewer collectibles over time
-        enemyDensity = min(0.8, 0.2 + (difficultyLevel * 0.05))  # More enemies over time
-        hazardDensity = min(0.4, 0.1 + (difficultyLevel * 0.03))  # More hazards over time
-        graveDensity = max(0.15, 0.25 - (difficultyLevel * 0.01))  # Moderate grave density, slight decrease over time
-        objectDensity = max(0.1, 0.2 - (difficultyLevel * 0.01))  # Fewer misc objects over time
+        # Ensure total probabilities stay under 1.0 to prevent graves being squeezed out
+        collectibleDensity = max(0.05, 0.15 - (difficultyLevel * 0.01))  # Fewer collectibles over time
+        enemyDensity = min(0.4, 0.15 + (difficultyLevel * 0.025))  # More enemies over time
+        hazardDensity = min(0.2, 0.05 + (difficultyLevel * 0.015))  # More hazards over time
+        graveDensity = 0.25  # Constant grave density throughout all waves
+        objectDensity = max(0.05, 0.1 - (difficultyLevel * 0.005))  # Fewer misc objects over time
 
         # Generate objects across the segment with buffer zones
         startBufferZone = 25  # Safe zone at start of each wave
         endBufferZone = 30  # Safe zone at end of each wave
         currentX = startBufferZone  # Start placing objects after start buffer zone
 
+        # Guarantee at least one coffin per wave if coffins exist in templates
+        coffinTemplates = [obj for obj in self.objectTemplates if obj.get("type") == "coffin"]
+        coffin_placed = False
+        if coffinTemplates:
+            # Place guaranteed coffin in the first quarter of the level
+            coffin_x = random.randint(startBufferZone + 10, (segmentLength - endBufferZone) // 4)
+            coffin_template = random.choice(coffinTemplates)
+            coffin_obj = copy.deepcopy(coffin_template)
+            coffin_obj["item"] = "random"  # Override any specified item
+            coffin_obj["x"] = coffin_x
+            levelData["objects"].append(coffin_obj)
+            coffin_placed = True
+
         while currentX < segmentLength - endBufferZone:
             # Determine what to place based on probability
             rand = random.random()
@@ -270,9 +284,9 @@ class SurvivalGenerator:
         baseChance = obj.get("zombie_spawn_chance", 0)
         obj["zombie_spawn_chance"] = min(50, baseChance + (difficultyLevel * 2))
 
-        # Add item spawn chance that scales with difficulty (more items later when you need them)
-        baseItemChance = 30  # 30% base chance
-        obj["item_spawn_chance"] = min(70, baseItemChance + (difficultyLevel * 3))
+        # Add item spawn chance that decreases with difficulty (fewer items in later waves)
+        baseItemChance = 50  # 50% base chance
+        obj["item_spawn_chance"] = max(10, baseItemChance - (difficultyLevel * 2))
         obj["item"] = "random"  # Will be resolved to specific item in level generation
 
         # Handle x_range vs single x