Use left and right arrow keys to move side to side, and space bar to shoot. Don't let the invaders reach you or shoot you, otherwise it's game over. Enjoy : ) If the game starts and goes straight to the game over screen, just click the green flag again.
Of course credit goes out to the original creators of the game. I did not draw any of the sprites and got them off various websites, except the game over screens and the barriers and the exploding ship. Also I got the music from youtube (can't remember the exact video/channel but I think it was one of the first results that came up when you search "space invaders theme"). I also got the sound effects from http://www.classicgaming.cc/classics/spaceinvaders/sounds.php
