The game works like this: The arrow keys control the movement of the instect like creature (Yar). The spacebar makes him fire. If Yar touches the bad guy on the other side of the screen, he gets a nuclear missle, wich is the only weapon that will kill the bad guy. There are several things that will kill Yar. The nuclear missle, the spinning krull that the bad guy occasionaly transforms into, and the bad missle that constantly follows Yar will kill him at the slightest touch. There is also a gray band in the screen. When Yar is inside of this band, he can't fire anything. Oh, yeah, the bad missle gets faster every level.

If your controls don't work, click your mouse inside of the gray band.

Here are some Yar's Revenge links for your linking pleasure.