game: add menu

game/main_menu.gd

@@ -0,0 +1,13 @@
+extends Control
+
+
+func _on_play_pressed() -> void:
+	get_tree().change_scene_to_file("res://world.tscn")
+
+
+func _on_options_pressed() -> void:
+	get_tree().change_scene_to_file("res://options_menu.tscn")
+
+
+func _on_quit_pressed() -> void:
+	get_tree().quit(0)