Hi Copangtnc,
Greetings!!!!!!!
As your first Case is working fine,
For Second Case : You need to valiadte the message and need to switch the on second scene from First Scene using getLastMessage function.
Game Running : You need add same callback as added on Splash Scene If want to gets the Notification while Game is running, you can also use getLastPushMessage API as well to trigered the message.
If you don't want to show push message on Notificar Bar while Game Running you can use app42pushserviceV2.jar file, but for testing I will suggest you to use the app42pushservice.jar file.
Let me know if it helps.
Thanks
Vishnu Garg