The game - Bonk's Adventure - Dendy | NES

The hero of the game is a guy with a huge head. To her, he cracks down on enemies, falling on them with the top of his head. If the guy eats meat, he immediately becomes terribly excited, and can beat enemies, just hitting them head-on. After a while, the excitement disappears, but then you can eat more meat. And so it continues throughout the game.