Wacko

Kapt'n Krooz'r is a green alien in an armed flying saucer, who is on a planet infested by monsters of various types. Shooting a monster with the ray-gun will cause the monster to freeze temporarily. If the second matching type monster is shot while the first is still frozen, then that pair disappears. Krooz'r may progress to the next level by ridding the screen of all monsters, and play continues …