Started fps system

scripts/gui/lobby/lobby_buttons.gd

@@ -5,6 +5,8 @@ func _ready() -> void:
 
 func _on_leave_button_pressed() -> void:
 	Lobby.leave()
+	$"../..".hide()
+	$"../../../MainMenu".show()
 
 func _on_start_button_pressed() -> void:
 	Lobby.start_game.rpc()

scripts/gui/main_menu_gui.gd

@@ -9,6 +9,11 @@ func _on_host_button_pressed() -> void:
 
 
 func _on_connect_button_pressed() -> void:
-	Lobby.join("localhost")
+	var ip = $MainMenu/VBoxContainer/LineEdit.text
+	if ip == "":
+		ip = "localhost"
+	var joined = Lobby.join(ip)
+	if joined != Error.OK:
+		return
 	$MainMenu.hide()
 	$Lobby.show()