Add Live Multiplayer To My Flappy Bird Like Game on iOS/Xcode

I have a flappy bird like game for the iPad, and iPhone 5/4 that I would like to have multiplayer on. I would like it so it gets a match of up to 16 people via game centre, or have a game with friends where you can invite people. When the game is started, I would like it to be showing a live game where your bird is normal with a circle around it, and then the other players bird characters will be transparent so it is easy to locate them. I will provide my source code for the game. Bid only if you have lots of feedback and experience, knowing you can do this. A game that is similar to this on the app store is called Flappy Party Revenge - All the Smash hit You must be able to see the view from all the different devices.