Use the arrow keys to control your ship. The difficulty comes with aiming.. moving your ship causes it to tilt, altering your aim. A skilled UFO pilot can use this to their advantage. You will probably also have to maneuver to avoid missiles if you can't shoot them down fast enough.

[Spacebar] Fires your laser. (recharges slowly)

[P] Pause the game
[C] Controls and tips
[M] Music volume

- Try to shoot the guys with missiles before they have a chance to fire.

- Missiles can be tricked into the hitting the ground.

- This game is not easy, and I do not recommend the "easy" setting, as you loose the incentive to avoid getting hit.

Maybe this demonstration can assist (it's on "Uber Tough" difficulty).