Looking for '80's spcae combat game

[pacman3 mil]

In the game, I'm in a tube and the enemy objects come up towards me at the top of the tube. If they get to the top, they try to flip on top of me.

When I clear a tube, I'm fired down the tube into the next tube.

I forget the name of this game. Thanks in advance for the help in finding out what it is.

 

[Karthesios]

I think you're talking about Tempest. In fact, I'm sure of it.

 

[Sgt. Cow]

Definitely Tempest. I haven't seen anything similar to your description other than Tempest. I also have it on my computer.