This is very straight forward. You have to start the game using the kinect. If you use the controller it will not let you switch to kinect. So at the title screen use your hand, then push forward on the command button.
To make it easy the 1st go load up game and turn on voice command in settings.
then do the following
back out to title screen
then place hand over play and push forward
then say single player
then say Tatooine
then say select
then say one
then launch bird with hand (to grab close hand and to launch open hand)
you do not have to win the level. just play through it once.
achievement will unlocked. Took me a couple minutes to figure out you had to back out all the way to title screen to allow the kinect option.
The voice commands only do not work for this achievement , I try it 1st you must do everything with your hands.