Arrow keys for left and right, Space to shoot. The higher the alien, the higher the score A new level brings a new life but they can fire more missiles and are faster. Destroying a UFO brings either Dual fire, Rerock, Speed-up or Cyclic - try 'em out!
People have been saying that my original Space Invaders (written YEARS ago!) is too slow, so I thought this might be a bit better. All comments welcome. 1.1 - Smoother text method and high-speed slowed down 1.2 - Difficulty levels now included which will affect missile speed, alien acceleration and original height
