diff --git a/bg/dynamic_bg/dynamic_bg.gd b/bg/dynamic_bg/dynamic_bg.gd
new file mode 100644
index 0000000..d03768c
--- /dev/null
+++ b/bg/dynamic_bg/dynamic_bg.gd
@@ -0,0 +1,46 @@
+extends Node2D
+
+
+const DynamicBgPattern = preload("res://bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.tscn")
+
+
+const WIDTH = 1920 / 4
+const HEIGHT = 1080 / 4
+
+const W_STEP := 60
+const H_STEP := 6
+
+var VELOCITY = 30 * Vector2.from_angle(-atan(2))
+
+func spawn(x_offset, y_offset):
+	var pat_x = -WIDTH + x_offset
+	var pat_y = HEIGHT + y_offset
+	
+	while pat_x < WIDTH + 50:
+		var new_pattern = DynamicBgPattern.instantiate()
+		
+		new_pattern.position = Vector2(pat_x, pat_y)
+		new_pattern.velocity = VELOCITY
+		add_child(new_pattern)
+		
+		pat_x += W_STEP
+		pat_y += H_STEP
+
+
+func _ready():
+	var x_offset = 0
+	var y_offset = 0
+	while HEIGHT + y_offset + (WIDTH / W_STEP) * H_STEP > -50:
+		spawn(x_offset, y_offset)
+		x_offset += $Timer.wait_time * VELOCITY.x
+		x_offset -= int(x_offset / W_STEP) * W_STEP
+		y_offset += $Timer.wait_time * VELOCITY.y
+		print(y_offset)
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta):
+	pass
+
+
+func _on_timer_timeout():
+	spawn(0, 0)
diff --git a/bg/dynamic_bg/dynamic_bg.tscn b/bg/dynamic_bg/dynamic_bg.tscn
new file mode 100644
index 0000000..c9c0f10
--- /dev/null
+++ b/bg/dynamic_bg/dynamic_bg.tscn
@@ -0,0 +1,13 @@
+[gd_scene load_steps=2 format=3 uid="uid://d3geq38s5fjc6"]
+
+[ext_resource type="Script" path="res://bg/dynamic_bg/dynamic_bg.gd" id="1_g3cph"]
+
+[node name="DynamicBg" type="Node2D"]
+z_index = -4096
+script = ExtResource("1_g3cph")
+
+[node name="Timer" type="Timer" parent="."]
+wait_time = 2.0
+autostart = true
+
+[connection signal="timeout" from="Timer" to="." method="_on_timer_timeout"]
diff --git a/bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.gd b/bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.gd
new file mode 100644
index 0000000..56f6834
--- /dev/null
+++ b/bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.gd
@@ -0,0 +1,18 @@
+extends Node2D
+
+
+var velocity : Vector2
+
+
+func _ready():
+	if randi() % 2 == 1:
+		$Word1.set_word("=*"[randi_range(0, 1)])
+		$Word2.set_word("DPb>"[randi_range(0, 2)])
+	else:
+		$Word1.set_word("qd<"[randi_range(0, 2)])
+		$Word2.set_word("=*"[randi_range(0, 1)])
+
+func _process(delta):
+	position += velocity * delta
+	if position.x > 1920 / 4 + 70 or position.y < -70:
+		queue_free()
diff --git a/bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.tscn b/bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.tscn
new file mode 100644
index 0000000..f25723d
--- /dev/null
+++ b/bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.tscn
@@ -0,0 +1,14 @@
+[gd_scene load_steps=3 format=3 uid="uid://dkm7ljv01kwma"]
+
+[ext_resource type="Script" path="res://bg/dynamic_bg/dynamic_bg_pattern/dynamic_bg_pattern.gd" id="1_hrrmh"]
+[ext_resource type="PackedScene" uid="uid://cvx7wowcbfo0r" path="res://objects/word/word.tscn" id="2_7jm3n"]
+
+[node name="DynamicBgPattern" type="Node2D"]
+modulate = Color(1, 1, 1, 0.12549)
+script = ExtResource("1_hrrmh")
+
+[node name="Word1" parent="." instance=ExtResource("2_7jm3n")]
+position = Vector2(-6, 0)
+
+[node name="Word2" parent="." instance=ExtResource("2_7jm3n")]
+position = Vector2(6, 0)
diff --git a/levels/base_level/base_level.gd b/levels/base_level/base_level.gd
index d3703c0..1bf00ed 100644
--- a/levels/base_level/base_level.gd
+++ b/levels/base_level/base_level.gd
@@ -199,15 +199,22 @@ func _on_back_button_pressed():
 	queue_free()
 
 func _on_next_level_button_pressed():
-	var base_level := BaseLevel.instantiate()
-	
 	if lvl_id == len(DATA[chap_id]) - 1:
-		base_level.init(chap_id + 1, 0)
+		var level_menu := LevelMenu.instantiate()
+		level_menu.init(chap_id + 1, -1)
+		get_tree().root.add_child(level_menu)
 	else:
+		var base_level := BaseLevel.instantiate()
 		base_level.init(chap_id, lvl_id + 1)
-	get_tree().root.add_child(base_level)
+		get_tree().root.add_child(base_level)
 	queue_free()
 	
 func _on_replay_button_pressed():
-	for card_base: CardBase in $CardBases.get_children():
-		card_base.reset_all_card_position()
+	var new_level = BaseLevel.instantiate()
+	new_level.init(chap_id, lvl_id)
+	get_tree().root.add_child(new_level)
+	queue_free()
+	#print(get_tree().current_scene)
+	#get_tree().reload_current_scene()
+	#for card_base: CardBase in $CardBases.get_children():
+		#card_base.reset_all_card_position()
diff --git a/levels/base_level/base_level.tscn b/levels/base_level/base_level.tscn
index e3df7fd..a07071d 100644
--- a/levels/base_level/base_level.tscn
+++ b/levels/base_level/base_level.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=15 format=3 uid="uid://cother2aiigge"]
+[gd_scene load_steps=16 format=3 uid="uid://cother2aiigge"]
 
 [ext_resource type="Script" path="res://levels/base_level/base_level.gd" id="1_diojb"]
 [ext_resource type="PackedScene" uid="uid://xom5kpqs1rue" path="res://objects/calculator/calculator.tscn" id="1_tpuy7"]
@@ -94,7 +94,7 @@ centered = false
 
 [node name="LevelClear" type="AudioStreamPlayer2D" parent="SFXs"]
 stream = ExtResource("3_ou3kh")
-volume_db = -26.29
+volume_db = -5.0
 
 [node name="WrongAnswer" type="AudioStreamPlayer2D" parent="SFXs"]
 stream = ExtResource("4_yxsxp")
diff --git a/levels/chapter_menu/level_menu/level_menu.gd b/levels/chapter_menu/level_menu/level_menu.gd
index 042134d..7d20717 100644
--- a/levels/chapter_menu/level_menu/level_menu.gd
+++ b/levels/chapter_menu/level_menu/level_menu.gd
@@ -8,6 +8,7 @@ const I_NUMBER = ["I","II","III","VI","V"]
 
 const LevelButton := preload("res://levels/chapter_menu/level_menu/level_button/level_button.tscn")
 const BaseLevel := preload("res://levels/base_level/base_level.tscn")
+const Credits := preload("res://objects/credits/credits.tscn")
 
 # Called when the node enters the scene tree for the first time.
 
@@ -18,6 +19,12 @@ const button_heigth : int = 50
 func init(chap_id : int, lvl_num : int) -> void:
 	#print("init?")
 	
+	if chap_id == len(BaseLevel.instantiate().DATA):
+		add_child(Credits.instantiate())
+		$Title.set_text("")
+		return
+		
+	
 	if lvl_num == -1:
 		lvl_num = len(BaseLevel.instantiate().DATA[chap_id])
 	
diff --git a/main.tscn b/main.tscn
index a1fc332..8774989 100644
--- a/main.tscn
+++ b/main.tscn
@@ -1,7 +1,12 @@
-[gd_scene load_steps=2 format=3 uid="uid://c17fbsiogbgo1"]
+[gd_scene load_steps=3 format=3 uid="uid://c17fbsiogbgo1"]
 
 [ext_resource type="PackedScene" uid="uid://c07co5p46apu7" path="res://objects/main_menu/main_menu.tscn" id="1_fk6j6"]
+[ext_resource type="PackedScene" uid="uid://d3geq38s5fjc6" path="res://bg/dynamic_bg/dynamic_bg.tscn" id="2_8k4il"]
 
 [node name="Main" type="Node"]
 
 [node name="MainMenu" parent="." instance=ExtResource("1_fk6j6")]
+
+[node name="Bg" type="Node" parent="."]
+
+[node name="DynamicBg" parent="Bg" instance=ExtResource("2_8k4il")]
diff --git a/objects/credits/credits.tscn b/objects/credits/credits.tscn
new file mode 100644
index 0000000..c167d63
--- /dev/null
+++ b/objects/credits/credits.tscn
@@ -0,0 +1,22 @@
+[gd_scene load_steps=2 format=3 uid="uid://cdu8yubd7fyvb"]
+
+[ext_resource type="FontFile" uid="uid://1000owdyvwfg" path="res://fonts/unifont-15.1.04.otf" id="1_re7ax"]
+
+[node name="Label" type="Label"]
+custom_minimum_size = Vector2(480, 256)
+offset_right = 40.0
+offset_bottom = 23.0
+theme_override_fonts/font = ExtResource("1_re7ax")
+text = " 
+ 
+[ Equal to P ]
+ 
+Created by 玩一个四字音游导致的 @ GGJ2024
+ 
+ligen131         Tsukimaru
+ 
+  Bunnycxk       IssactheMouse
+ 
+ 
+THANKS FOR PLAYING! ;-)"
+horizontal_alignment = 1