I was one of the "kids" that played the original text games on my old Atari 400 and TRS-80 and definately agree that the games can be fun. That being said, I believe the most important aspect of any game is it's primary medium of relaying information. In a graphical game, the better the graphics are and the more intuitive they are, the better experience the player will have. Don't get me wrong, you can have terrific graphics and still have a crappy game.
For a text game the primary medium isn't as easy. First, you have to have a compelling story, rich with descriptions of the world the player is in. The logic must be solid since the player will be following it to get from point A to point Z. The use of language is the most important aspect of a text game. Once you know your target audience, you can tailor your use of language to cater to that group. Because you don't have sounds and graphics to help you tell the story, you must be able to paint a vivid picture of what is going on, be able to instill a sense of urgency in the player about the mission, and end the story in a gratifying manner that will leave the player with a true sense of occomplishment.
To me, that is extremely intimidating to think about. :geek: