If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
It is a simple one-button game in which you have to navigate our Kriby past the obstacles. Each time you press,Kirby flies up. Don't make it fly too high or it will die. This means you have to tap at the right moments to make Kirby go as far as you can!
Space bar - To fly.