Destroyer

Destroyer is a space-based vertical shoot-em-up in Spanish. You control a star-fighter which moves horizontally and fires vertically, and must take down formations of attacking aliens without being hit yourself. Each level has its own particular type of alien with distinctive movement and attack patterns. Once you have cycled through each of the alien types, you have to deal with the large green head of an alien monster. This is invulnerable except when a small hole occasionally opens up in the middle of its forehead. Once the boss has been defeated, the earlier levels repeat.