Chicken Racer
In the Chicken Race level put on a glider and if you just keep racing off the end of the air craft carrier there is an island with a treasure chest on it. Grab it and the message "GET" will appear on screen. This will give you a new car which looks like a chicken drumstick on a silver platter.

Faster time
While you are flying and your wings are about to retract, pause game play. The wings will retract while the game is paused, giving you a quicker landing and possibly a faster time