Translation:That goal was important in the game.
Agreed, it seems Duo is wrong here. "Juego" is for non-sport games - board games (juegos de mesa), card games (juegos de cartas), etc. "Partido" is for sports. According to spanishdict, the word "gol" only refers to the goals scored in sports. So yeah, this should be "partido".
Casi no se le entiede nada a esa cosa. Por favor mejoren esa pronunciasion.