Looking for game name (Defender like)

When I was a kid I saw arcade very similar to Defender. Graphics was nearly the same, game play very similar. Differences was that player and scenery moves only to the right, and besides lasers he can also drop bombs (trace of the bombs imitate physics so it doesn't fly straight down but a little forward to, like a hyperbolic). Enemies was similar too, except it was a rockets which, when not bombed in time, started to fly up on collision course with player's ship. There were also fuel tanks on the ground that should be bomber, too, for a higher score. Some levels have a ceiling so player flies in a tunnel.

I tried to search Google but results were overwhelming with classic Defender game which is not exactly what I'm looking for. Anyone has a clue? Thanks in advance.

I got it - if someone's interested it's http://www.arcade-history.com/?n=scramble&page=detail&id=2328 (Scramble).