Oystron

The game tracks the score and a meter is filled at the bottom of the screen showing progress. The player has four lives, with an extra one provided for every 4,000 points. Collecting pearls also gives access to a "pearl zone" on the left side of the screen, where they can be stored. However, enemies can still steal them when they pass.

As the game progresses, a meter fills up at the bottom of the screen showing progress. When it reaches certain points, bombs are provided for clearing rows of eight pearls. The game also features Oystron bosses that appear at the end of levels. These bosses must be defeated by placing a bomb in their path to avoid being hit. The player's ship then enters a warp phase, moving quickly and avoiding enemy collisions.