There isn't a lot to this game. You play as some version of a primitive human, who finds some mushrooms, eats them and has a giant leap forward in consciousness, enough to eventually (Spoiler - click to show)join a human town. Even though this is a choice-based game the story line is very minimal and the game is mostly about solving some simple puzzles. That's really it, give it a whirl, it won't take long.
Two things I really liked about it:
1) How the prose got more verbose/detailed the more mushrooms were consumed. I thought it was a nice illustration of the increasing intelligence of the player character.
2) How the author was able to program a Tic-Tac-Toe and Mancala AI in Ink for the game.