Android controls

Hey all i'm a noob at unity and i have built a basic game for my android (sony xperia s), anyway i built it and sent it to my android for testing and i can look up and down that's it :(

could anyone give me a touchscreen fps script and explain how the touch screen thing works please. Sory if im asking a lot but i know the scripts for the pc are built in default but i don't understand android and i need to make a game for my phone so i can play it when im on the go.

Just in case you are wondering i am a cheapskate i would rather build my own game that pay for them on the phone that is i buy all my PC games because i know i would never be able to make a game as good as battlefield 3