Optimize backgound - move it to root node

scenes/main.tscn

@@ -1,7 +1,8 @@
-[gd_scene load_steps=3 format=3 uid="uid://ci2gk11211n0d"]
+[gd_scene load_steps=4 format=3 uid="uid://ci2gk11211n0d"]
 
 [ext_resource type="Script" uid="uid://cwlop1ettlqhg" path="res://scripts/Main.gd" id="1_0wfyh"]
 [ext_resource type="PackedScene" uid="uid://gbe1jarrwqsi" path="res://ui/PressAnyKeyScreen.tscn" id="1_o5qli"]
+[ext_resource type="Texture2D" uid="uid://c8y6tlvcgh2gn" path="res://resources/textures/beanstalk-dark.webp" id="2_sugp2"]
 
 [node name="main" type="Control"]
 layout_mode = 3
@@ -12,5 +13,15 @@ grow_horizontal = 2
 grow_vertical = 2
 script = ExtResource("1_0wfyh")
 
+[node name="Background" type="TextureRect" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+texture = ExtResource("2_sugp2")
+stretch_mode = 1
+
 [node name="PressAnyKeyScreen" parent="." instance=ExtResource("1_o5qli")]
 layout_mode = 1