This game was based on a 1980's video game called "Blitz", for the MSX line of computers. Blitz is a video game written in BASIC. In order to play this game, you needed to type its code listing available in the book "MSX Jeux D'action" by Pierre Monsault:
Blitz's original story was all about bombing buildings. Since 9/11, this concept could be seen as "unfitting". Thus, I moved the game to outer space, replaced the buildings to mere rocks and the bomber became a spaceship.
Space Blitz is a 100% free video game created by Robson dos Santos França and it's his first video game for the Android platform.