Parodius

The Great Octopus has threatened Earth. To help Parodius save the planet, you and his friends must begin your search for the truth. As you search the whole world over you must find the enemy and you must destroy him.

This is mostly a parody of Gradius, with some flavor from other shoot-em-ups, like Twinbee. The series is available on numerous platforms.

The game is a right-to-left scrolling shoot-em-up. You can choose from 4 different flying creatures, with different weapons. You must finish 7 stages, each having a boss at the end. You may start at either one, but must complete every level to advance to the final stage.

This version was also re-released in color as part of the Konami GB Collection Vol. 2.