The game itself was actually in monochrome, so colored overlays were used to simulate a color game.
In 2014's "Guardians of the Galaxy", the basic strategy the heroes employ with their spaceship (trying to hold off the enemy before he makes it to the ground) was inspired by this game.
When Space Invaders was released in Japan in 1978, it was an instant hit among the Japanese public. Practically the whole country was obsessed with the game, there were even reports of youths committing robberies just to play it. The machines ran on 100-Yen coins, and people plunked down enough of them to cause a nationwide shortage of 100-Yen coins. The government eventually produced four times the normal amount of 100-Yen coins in order to keep up with the Space Invaders craze.