You start the game by running as fast as you can to make a succesfull take off. Hit the left and right arrow keys alternately as quick as you can to make him run. If he is going fast enough you will make a good take off if not you fall down the cliff.. Once flying use the up and down key to swoop and dive.
Canyon Glider controls
Use the keyboard to gain speed, then use the left/right arrowkeys to fly.