Classic Helicopter Game Fuel

You control a chopper that is flying through a cave! There are many obstacles in your way that you must avoid or otherwise you will be destroyed. Your chopper will move down by default, but you can go up by holding down the mouse button or touching the device screen. And don't forget about fuel! Your fuel is limited and you have to gather fuel on your way or you will lose when you run out of it. Whenever you lose, you can submit your score on leaderboard and compete with others.