Lunar Leeper

Leepers are cute,
Leepers are sly,
It's a game full of dodging
to shoot up an eye.

Fly up and fly down
Forward and back,
Rescue your men,
before Leepers attack.

Fire if you must
to save men and your ship
But you'll get more points
If you give the the slip.

When the rescue is done
And your fuel running low
Fly into the cave
To dim the eye's glow

The mission complete
Both stages at end
A new rescue mission
Starts all over again!

Source:

Back of Box - VIC-20 (CA-US)