Back in 1984, Infocom and Douglas Adams released a text adventure game based on Adam's Hitchiker's Guide to the Galaxy books. I remember playing this on my Commodore 64 in the late '80s.
BBC Radio 4 has converted the game into Flash so that you can play it on-line. Even better, they have two different illustrated versions of the game. It's still a text game, but with illustrations of each location as you play the game.
To play the game, choose which illustrated version you want, then have fun.