Apple Blaster

Description
Apple Blaster or Atari Blaster is a 1-player arcade game for multiple systems.
The player controls a small spaceship in the center of the screen, which can fire in the 4 cardinal directions. Enemy space ships approach from the 4 directions, and the player must shoot them before the enemy ships reach the space ship in the center. The player gains 10 points for enemy ship destroyed. Once per game, the player can instantly destroy all enemies on the screen.