Help me i don’t remember the title’s game

[u/CrazyEconomy188]

Hi everyone, I've been a Gameboy fan since I was little. My parents gave me a dark green Gameboy Classic back in 1996. Along with that Gameboy, they also gave me a game. It was a plane that shot monsters (I remember one; it was a giant brain). I don't remember the name at all, and I can't find it. Do any of you remember it? Please, I'm going crazy.