Add save game feature and facebook ads mediation along with google admob in my simple game

Job ID: 32178099

Budget: $10 – $50 USD

Dear freelancer i need to add save games in my unity game app, also i want to add facebook ads mediation with google admob through anydesk.
here is the link of my game app.
https://play.google.com/store/apps/details?id=com.archery.savebirds
Right now i am facing the problem which is if i update my game app with new aab file it starts from level-1 so that i need user to play continue with the level no matter how many times users updated of reinstall the game.