You're playing a skydiver commando. He must fight his way through 5 rounds and stay in the air until he reaches level 5 where he can land.
Game controls are simple: arrow keys to move, mouse to aim and shoot. Shoot as many enemy aircraft as you can, avoid hitting birds, try to collect as many fuel bonuses as you can - because if you land before level 5, it's a game over. You must try to stay longer in the air and use your jetpack wisely, do not waste the fuel when you don't need to.