VALKYR

In Valkyr the player is in control of a spaceship which can be moved left
and right. The aim is to shoot the aliens flying around and collect the
precious metal they are carrying. You are up against the clock and from flying
UFOs . You must shoot loads of aliens to go to the next level, if you run out
of time the `head` alien comes at you and kills you!

There are three different stages. On the first two, the player must shoot as
many aliens, while on the third the craft must be landed. The game then loops,