Here it is, restored in all its glory, "Hunt the Wumpus." Before Colossal Cave, there was Hunt the Wumpus. By today's standards it wouldn't even place in any IF competition. But, back in '72 it was the only piece of IF available, the first of its kind.
The interface is very limited. You can only shoot an arrow into an adjacent room, or move to an adjacent room.
The prose non-existent, consisting of the coordinates of the room you occupy and whether you sense a pit or a wumpus nearby.
Beyond the lethal pits and wumpus, there is only one other obstacle, the bat. The bat takes you and deposits you in a random location (which may contain either pit or wumpus.)
There is no exploration; there is no twist of plot; there are no revelations into the human condition. It is a simple game, one in which you either kill the wumpus or die. Still, as the great-granddady of IF, it deserves special consideration. All true adventurers should relish this piece of history.