Mechanically, a clever variant on the idle genre that manages to hit the satisfaction of constant growth without ever actually giving you a thing that automates your clicks. You only get to the point where your clicks are the only limit to your progress well into the game, and even then in a constrained context—a logarithmic-scale idle game rather than exponential-scale, and to my mind more fun for it. The experiments at the heart of the game bring an aspect of exploration to the genre which my wife aptly describes as "the map discovery of a 4X + cooking in your kitchen + being four and combining dirt and leaves and water in the backyard to see what happens".

Thematically, haunting and intriguing and baffling in all the right measures—particularly once you brew up a radio and start listening to the excellent soundtrack. Evergreen Branca is a character whose only explicit personality comes from their opening letter, but they're well-defined even so by the empty space you see of them in the letters they abiogenerate. Even comes the brief descriptions of objects and locations feel like they come from Dr. Branca's wry and weary mind, rather than a separate narrator.

Altogether a short, quiet game but an affecting one.