add game menu

core/game_menu/option_menu.gd

@@ -0,0 +1,36 @@
+extends Control
+
+@onready var play_button: Control = $%PlayButton
+@onready var resume_button: Control = $%ResumeButton
+
+
+func _ready() -> void:
+	GameState.on_game_paused.connect(_on_game_paused)
+	GameState.on_game_resumed.connect(_on_game_resumed)
+	resume_button.hide()
+
+
+func _on_game_paused() -> void:
+	play_button.hide()
+	resume_button.show()
+
+
+func _on_game_resumed() -> void:
+	play_button.show()
+	resume_button.hide()
+
+
+func _on_play_button_on_button_pressed() -> void:
+	pass # Replace with function body.
+
+
+func _on_resume_button_on_button_pressed() -> void:
+	GameState.resume_game()
+
+
+func _on_save_button_on_button_pressed() -> void:
+	GameState.save_game()
+
+
+func _on_quit_button_on_button_pressed() -> void:
+	GameState.quit_game()