Basic UI Logic and game state

core/scripts/GameManager.gd

@@ -4,6 +4,7 @@ extends Node3D
 @export var camera_array: Array[Camera3D] = []
 @export var current_camera: int = 0
 @export var game_started: bool = false
+@export var is_paused: bool = false
 
 
 func _process(delta):

core/scripts/main_menu.gd

@@ -7,6 +7,7 @@ extends Control
 func _ready():
 	start_button.pressed.connect(_on_start_button_pressed)
 	quit_button.pressed.connect(_on_quit_button_pressed)
+	self.visibility_changed.connect(_on_visibility_changed)
 	start_button.grab_focus()
 
 
@@ -17,3 +18,8 @@ func _on_start_button_pressed():
 
 func _on_quit_button_pressed():
 	get_tree().quit()
+
+
+func _on_visibility_changed() -> void:
+	if visible:
+		start_button.grab_focus()

core/scripts/pause_menu.gd

@@ -0,0 +1,38 @@
+extends Control
+
+
+@export var resume_button: Button
+@export var quit_button: Button
+
+
+func _ready():
+	resume_button.pressed.connect(_on_resume_button_pressed)
+	quit_button.pressed.connect(_on_quit_button_pressed)
+	self.visibility_changed.connect(_on_visibility_changed)
+
+
+func _on_resume_button_pressed():
+	hide()
+	_toggle_pause_state(false)
+
+
+func _on_quit_button_pressed():
+	get_tree().quit()
+
+
+func _input(event: InputEvent) -> void:
+	if Input.is_action_just_pressed("start") and !GameManager.is_paused and GameManager.game_started:
+		_toggle_pause_state(true)
+	elif Input.is_action_just_pressed("start") and GameManager.is_paused:
+		_toggle_pause_state(false)
+
+
+func _toggle_pause_state(state: bool):
+	get_tree().paused = state
+	GameManager.is_paused = state
+	visible = state
+
+
+func _on_visibility_changed() -> void:
+	if visible:
+		resume_button.grab_focus()