Wire elevator panel sfx and randomized chase music

Play SfxOpen on floor start, ding each blocked pulse, and close on the countdown into the next floor
- start a randomized chase track per pulse (avoiding immediate repeats) and fade it out via tween on block or doors closing
- Delay the auto-close after the final survivor by 0.25s so the ding doesn't collide with the close sound!

scenes/elevator_panel.gd

@@ -19,6 +19,14 @@ var points_per_person := 100  # base + bonus per person above threshold
 
 var people_in_elevator := 0
 
+const CHASE_SHORT_1 := preload("res://audio/Shortchase1.wav")
+const CHASE_SHORT_2 := preload("res://audio/Shortchase2.wav")
+const CHASE_MID := preload("res://audio/Midchase1.wav")
+const CHASE_LONG := preload("res://audio/Chase1.wav")
+const CHASE_TRACKS := [CHASE_SHORT_1, CHASE_SHORT_2, CHASE_MID, CHASE_LONG]
+var _last_chase: AudioStream = null
+var _chase_tween: Tween = null
+
 func _ready():
 	var button = $PanelMargin/PanelColumn/CloseButton
 	button.text = "BLOCK"
@@ -38,6 +46,7 @@ func _unhandled_input(event):
 # --- Floor lifecycle ---
 
 func _start_floor():
+	$SfxOpen.play()
 	doors_closing_flag = false
 	people_in_elevator = 0
 
@@ -51,6 +60,7 @@ func _start_floor():
 	var screen = $PanelMargin/PanelColumn/Screen
 	screen.start()
 	screen.launch_pulse()  # first survivor arrives
+	_start_chase()
 
 # --- Input ---
 
@@ -62,14 +72,17 @@ func _on_block_pressed():
 # --- Pulse callbacks ---
 
 func _on_pulse_blocked():
+	_stop_chase()
 	# This survivor made it in
 	survivors_remaining -= 1
 	people_in_elevator += 1
+	$SfxDing.play()
 	EventBus.people_changed.emit(people_in_elevator, threshold)
 
 	if survivors_remaining <= 0:
-		# Everyone's in, close doors (auto-success)
-		_on_doors_closing()
+		# Everyone's in, close doors (auto-success). Brief delay so the
+		# last ding doesn't collide with the close sound.
+		get_tree().create_timer(0.25).timeout.connect(_on_doors_closing, CONNECT_ONE_SHOT)
 		return
 
 	# More survivors approaching: launch next pulse after gap
@@ -78,7 +91,8 @@ func _on_pulse_blocked():
 	get_tree().create_timer(gap).timeout.connect(
 		func():
 			if not doors_closing_flag:
-				screen.launch_pulse(),
+				screen.launch_pulse()
+				_start_chase(),
 		CONNECT_ONE_SHOT
 	)
 
@@ -87,6 +101,8 @@ func _on_doors_closing():
 		return
 	doors_closing_flag = true
 
+	_stop_chase()
+
 	var screen = $PanelMargin/PanelColumn/Screen
 
 	# Lose: not enough people
@@ -114,9 +130,29 @@ func _on_doors_closing():
 		return
 
 	# Next floor after countdown
+	$SfxClose.play()
 	screen.show_countdown()
 	screen.shrink_block_zone()
 
 	var tween = create_tween()
 	tween.tween_interval(2.0)
 	tween.tween_callback(_start_floor)
+
+func _start_chase():
+	if _chase_tween and _chase_tween.is_valid():
+		_chase_tween.kill()
+
+	var candidates: Array = CHASE_TRACKS.filter(func(s): return s != _last_chase)
+	var stream: AudioStream = candidates[randi() % candidates.size()]
+	_last_chase = stream
+
+	$SfxChase.stream = stream
+	$SfxChase.volume_db = 0.0
+	$SfxChase.play()
+
+func _stop_chase():
+	if _chase_tween and _chase_tween.is_valid():
+		_chase_tween.kill()
+	_chase_tween = create_tween()
+	_chase_tween.tween_property($SfxChase, "volume_db", -80.0, 0.3)
+	_chase_tween.tween_callback($SfxChase.stop)