I'm looking for some game ideas to create for a website. This section of my website will be dedicated to the "earlier classics" back in the days of Atari 2600. I'm thinking games that are really easy to create, and easy to play. For example, Asteroids, Pac-Man, and similar. I would like to have at the least 10 games like this, but would gladly have plenty more. I intend to "recreate" the original gameplay, even though the graphics will not be the same. For example, for the Asteroids clone, I would only have the one weapon, the asteroids, and the random alien that comes every now and then. I may have a little more sound effects and graphics than the original, and I'm not going to exactly duplicate the games level by level, but I DO want to duplicate the gameplay. For some of the games, I may also create an "extended" version, that adds on things, for example in the case of asteroids, have different enemies, maybe make the screen area larger than 1 screen only, have weapons and/or powerups, etc... But I don't know if I'm going to do that for all games. Also, please note that the games don't HAVE to be on the Atari, but the general idea is that the games are similar in era and complexity. I'm looking for the "short and sweet" kind of games. So far, the following list is what I have. As I get ideas, I will add them to the list. Thanks in advance.

-Asteroids
-Pac-Man
-Yar's Revenge
-Space Invaders
-Missile Command
-Tetris
-Centipede
-Berzerk
-Frogger
-Snake
-Breakout
-1942
-005
-Tempest
-Duck Hunt