Refactored the pause menu to make it more consistent.

game/scenes/UI/pause_menu.gd

@@ -0,0 +1,51 @@
+extends CanvasLayer
+
+const START_SCREEN_SCENE := "res://scenes/UI/start_screen.tscn"
+
+@onready var buttons_container = $CenterContainer/PanelContainer/MarginContainer/VBoxContainer
+
+func _ready() -> void:
+	_register_focus_sounds()
+
+func _input(event):
+	if event.is_action_pressed("ui_cancel"):
+		if get_tree().paused:
+			resume_game()
+		else:
+			pause_game()
+
+func pause_game():
+	get_tree().paused = true
+	visible = true
+	Input.set_mouse_mode(Input.MOUSE_MODE_VISIBLE)
+
+func resume_game():
+	get_tree().paused = false
+	visible = false
+	Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)
+
+func _on_quit_button_pressed():
+	get_tree().quit()
+
+func _on_continue_button_pressed():
+	resume_game()
+
+func _on_main_menu_button_pressed():
+	resume_game()
+	Input.set_mouse_mode(Input.MOUSE_MODE_VISIBLE)
+	get_tree().change_scene_to_file(START_SCREEN_SCENE)
+
+func _register_focus_sounds() -> void:
+	if buttons_container == null:
+		return
+	for child in buttons_container.get_children():
+		if child is BaseButton:
+			var button: BaseButton = child
+			if not button.is_connected("focus_entered", Callable(self, "_on_menu_item_focus")):
+				button.focus_entered.connect(_on_menu_item_focus)
+			if not button.is_connected("mouse_entered", Callable(self, "_on_menu_item_focus")):
+				button.mouse_entered.connect(_on_menu_item_focus)
+
+func _on_menu_item_focus() -> void:
+	if MenuSfx:
+		MenuSfx.play_hover()

game/scenes/UI/pause_menu.gd.uid

@@ -0,0 +1 @@
+uid://ckh861smjghqc

game/scenes/UI/pause_menu.tscn

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+[gd_scene format=3 uid="uid://dp6jk0k3o4v1u"]
+
+[ext_resource type="Script" path="res://scenes/UI/pause_menu.gd" id="1_script"]
+[ext_resource type="Theme" uid="uid://wpxmub0n2dr3" path="res://themes/button_theme.tres" id="2_theme"]
+
+[node name="PauseMenu" type="CanvasLayer"]
+process_mode = 3
+visible = false
+script = ExtResource("1_script")
+
+[node name="Overlay" type="ColorRect" parent="."]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(0, 0, 0, 0.45098)
+
+[node name="CenterContainer" type="CenterContainer" parent="."]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="PanelContainer" type="PanelContainer" parent="CenterContainer"]
+custom_minimum_size = Vector2(250, 0)
+layout_mode = 2
+
+[node name="MarginContainer" type="MarginContainer" parent="CenterContainer/PanelContainer"]
+layout_mode = 2
+theme_override_constants/margin_left = 20
+theme_override_constants/margin_top = 20
+theme_override_constants/margin_right = 20
+theme_override_constants/margin_bottom = 20
+
+[node name="VBoxContainer" type="VBoxContainer" parent="CenterContainer/PanelContainer/MarginContainer"]
+layout_mode = 2
+theme_override_constants/separation = 10
+
+[node name="TitleLabel" type="Label" parent="CenterContainer/PanelContainer/MarginContainer/VBoxContainer"]
+layout_mode = 2
+theme_override_font_sizes/font_size = 24
+text = "Paused"
+horizontal_alignment = 1
+
+[node name="ContinueButton" type="Button" parent="CenterContainer/PanelContainer/MarginContainer/VBoxContainer"]
+layout_mode = 2
+theme = ExtResource("2_theme")
+text = "Continue"
+
+[node name="MainMenuButton" type="Button" parent="CenterContainer/PanelContainer/MarginContainer/VBoxContainer"]
+layout_mode = 2
+theme = ExtResource("2_theme")
+text = "Main Menu"
+
+[node name="QuitButton" type="Button" parent="CenterContainer/PanelContainer/MarginContainer/VBoxContainer"]
+layout_mode = 2
+theme = ExtResource("2_theme")
+text = "Quit"
+
+[connection signal="pressed" from="CenterContainer/PanelContainer/MarginContainer/VBoxContainer/ContinueButton" to="." method="_on_continue_button_pressed"]
+[connection signal="pressed" from="CenterContainer/PanelContainer/MarginContainer/VBoxContainer/MainMenuButton" to="." method="_on_main_menu_button_pressed"]
+[connection signal="pressed" from="CenterContainer/PanelContainer/MarginContainer/VBoxContainer/QuitButton" to="." method="_on_quit_button_pressed"]