started working on fog darkness

src/scripts/enemy_bat.gd

@@ -12,6 +12,11 @@ var detection_range: float = 80.0  # Range to detect players (much smaller)
 
 var fly_height: float = 8.0  # Z position when flying
 
+# Audio
+@onready var bat_flap_sfx: AudioStreamPlayer2D = $BatFlapSfx
+@onready var bat_chirp_sfx: AudioStreamPlayer2D = $BatChirpSfx
+var has_played_chase_sound: bool = false  # Track if we've played sound when starting to chase
+
 func _ready():
 	super._ready()
 	
@@ -80,9 +85,15 @@ func _idle_behavior(_delta):
 	if target_player:
 		var dist = global_position.distance_to(target_player.global_position)
 		if dist < detection_range:
-			# Start flying
+			# Start flying (chasing player)
+			var was_idle = (state == BatState.IDLE)
 			state = BatState.FLYING
 			state_timer = fly_duration
+			
+			# Play sound very seldom when starting to chase (only once per bat, with low chance)
+			if was_idle and not has_played_chase_sound and randf() < 0.15:  # 15% chance
+				_play_chase_sound()
+				has_played_chase_sound = true
 			return
 	
 	# Switch to flying after idle duration
@@ -177,3 +188,16 @@ func _play_death_animation():
 	
 	await fade_tween.finished
 	queue_free()
+
+func _play_chase_sound():
+	# Play a random bat sound when starting to chase (very seldom)
+	if not bat_flap_sfx and not bat_chirp_sfx:
+		return
+	
+	# Randomly choose between flap or chirp
+	if randf() < 0.5:
+		if bat_flap_sfx and bat_flap_sfx.stream:
+			bat_flap_sfx.play()
+	else:
+		if bat_chirp_sfx and bat_chirp_sfx.stream:
+			bat_chirp_sfx.play()