At the age I was, I got hours and hours of fun out of Adventureland ... 's demo. As sparse as the text was, as weird as the puzzles were, and as unsolvable as many of them proved to be in the demo, it still felt like I was being drawn into a vibrant world of the imagination. I loved it. I loved the things that I imagined happening off the edges of the map, and I loved the idea of a world where dragons take their sleep of ages in random meadows and jewels and objets d'art could be found hiding everywhere you look.
There are lots of things in Adventureland you wouldn't see much after the ascendance of Infocom. Ridiculously varied landscapes where the entire biome changes each time you take a short jog. Treasures lying out in the open, marked so you can tell them from dross items. Single-move puzzles where you just have to bring the right item. And absolutely bizarre moments like dealing with the bear.
In 1980, Zork would hit the commercial markets and instantly become a "killer app." But Adventure International would keep publishing games until 1984, because there was still a market for this kind of minimalist, constrained narrative experience. And, looking back on it, I can see why; it's like comparing the experience of an Atari 2600 game and a Playstation 4 game. It's not that the modern game is "better" because it's more sophisticated; the two are just different.