At the final level of Ghosts 'n Goblins, the only weapon you can finish the level with is the shield. I have not been able to destroy the two red monsters at the end. If I get close enough to hit them with the shield, they swoop down and kill me. Even if I just stay far away, they still swoop down and kill me.
What is a good strategy to destroy the two red monsters? I am playing the arcade game, not the NES port.