Android quiz edit/modify

Hi. i have a quiz app and i want 3 extra things 1. i want you to implement the google game play services so users can press the game play button in the end screen and see their score online and play with other users with my game 2. i want my app to be showing in fullscreen, with a few words to hide the status bar when the someone plays the game 3. add a button to enable or disable the sound of the game, in the main screen 4. to add an Revmob ad Link button in the start screen under the start button i thing i m clear ... for further details contact me. i can provide the source code of my app for you to do the changes that i want thank you