Make a loud sound to make him flap. Hold the "a" key to see the other variables. Sensitivity is how sensitive the sound is. So, you can play this game by just adjusting the sensitivity value from 0 to 100.
FFFFFFFF L A PPPPP F L AA P P F L A A P P FFFFFFFF L AAAA P P F L A A P P F L A A P F LLLLLLLLLL A A P