Ok so I don't know the name of it. But it was a sidescroller shooter game for the Sega Genesis. You played as like a kid and blasted enemies and there were upgrades. I think it had gun in the name.
I always get this game if im installing an emulator. It was great. I liked the combinations of guns you could choose. Either power up one of the 4 types or combine with another type. Homing lazers were always my go to.