This game is driving me mad!

I've spent a better portion of yesterday searching the forums, YouTube, talking to various AIs without a luck.

This is what I vividly remember about a game:

  1. I played it on some knockoff chinese entertainment system that had yellow cartridges. Most of the games were NES games, can't remember if it ran snes or arcade games too.

  2. You are flying a helicopter.

  3. Game was very difficult for me as a kid. Never got past first level. There were many enemies, way too many bullets for me to dodge.

  4. You are flying through a modern city, tall buildings and skyscrapers. They take most of the screen, like 70-80%, and above the buildings are bright blue skies. It's daytime. That is your background.

  5. Setting felt like it's late 90s, early 2000s, modern aerial warfare

  6. Screen was moving left to right at a steady, unchangeable pace. You could however move your helicopter anywhere in that screen.

  7. Enemies are spawning from the right, maybe they even sometimes came from the left to surprise you.

What I don't remember, since AI asked, are there powerups.

Please help me figure this one out, it will literally drive me crazy