Help - Looking for Name of a Game

[Ikrananka <classifieds79@hotmail.com>]

I really hope that someone can help identify a game that I used to
love playing on the Apple ][.  I remember playing it on a green
display and I believe the graphics were almost vector type.  It was
essentially a shooter (horizontal if I remember correctly) with a
number of stages.  I recall in one of the later stages there being a
mothership that you had to dock with with the word "MOTHER" on it.  I
also recall that the last stage had you trying to land your spaceship
dropping vertically down a very narrow vertical shaft with the landing
pad at the very bottom.

Fuel was involved in the game but I can't remember if one refueled via
the mothership docking or via fuel power ups.

I used to play the game around 1979/1980/1981.

I know my description is vague but hoping someone can help.

Thanks