If you think the most successful computer game is one of the multi-million dollar blockbusters of recent years, you're mistaken! This honor goes to the good old (well, good in its own way) Space Invaders, which has brought developers roughly 10 billion dollars in inflation-adjusted profits. It had a huge impact not only on the video game industry, but also on pop culture: even if you've never played Space Invaders, you would probably recognize the shapes of the invaders and the brave spaceship standing against them in the starry cosmos. It was back in 1978 that the game appeared on arcade machines, telling the story of a lone pilot who repulses hordes of aggressive crab-like aliens. Since then, it has spawned oodles of new editions on every imaginable platform and saved the Atari 2600. Today the latest versions have been released for Android and iOS. Now it's your turn! Write your own version of Space invaders right here on CodeGym under the watchful supervision of our senior developers. Your game will be similar to the classic version: set in outer space, with cute 8-bit graphics, the ability to shoot at belligerent invaders, both the rank-and-file and the "generals" who lurk behind them, and the ability to evade enemy fire by dodging left and right. The player must fight until he or she kills all the ordinary aliens and the boss. Or until he or she is struck down by an alien blast. We aren't looking for an easy way out. That's why our version will be harder than the original: the player gets only one life.