In the 1860s, physicist James Clerk Maxwell proposed a thought experiment in which a tiny agent observes molecules in a gas and opens a door at just the right moments, seemingly creating order from randomness. The “demon” name itself was later popularized by Lord Kelvin, and the idea has teased the second law of thermodynamics ever since.
This game turns that idea into a control problem. Particles drift like a warm gas. A wall splits the box. You can’t move particles directly—you only open brief “windows” in the wall by clicking or tapping near it. Your goal is to increase the separation score as fast as possible (Reach %) or to maximize it within 60 seconds.