This game is well written. It is both challening and fun. It plays much like the origional Space Invaders from the Atari 2600, and has simmilar graphics.
Space Invaders 1.1 provided me with hours of game play, especially in those long classes with nothing else to do. It eventually turned into a game that I played outside of class during leisure time. It is definately addictive!
I'm not sure how many levels are in the game, but it does get quite challenging as you progress. Trying to manuver back and forth to avoid enemy fire sounds easy enough, but don't let that decieve you!
The only 'problem' I found with the game is that after the splash screen loads, if you don't move right away, you may get shot. This can be solved by pressing the right arrow on your calculator as soon as the game starts. It should move you away from enemy fire.
This issue doesn't take away from the game at all. After a few times of playing the game through, it was barely even noticeable.
Overall, I'm very happy with this game, and would reccomend it to anyone who used to play Space Invaders, or to anyone who is just looking for a new game to play!