Maxwell's puzzling demon

About this game

What this puzzle is like

Maxwell's demon is the main character of this puzzle.
The demon does work of block-pushing.



Blocks have temperature. Some blocks are hot and others are cold.
While the demon doesn't like hot blocks, they can be cooled when adjacent to cold ones.

Keep your blocks and head cool

This game has 10 worlds.
Each world consists of dozens of levels, which are more than 350 in total.

The levels are located in form of blocks and are grouped at different corners of each world.
In this game, not only levels but also worlds themselves are puzzle.
Those levels once solved becomes pushable blocks.
You then use the blocks to access the next group of levels.



If you want more challenging ones, extra levels await you.
We're sure that it's difficult to even reach them.
(Don't worry. You have neither to reach nor to solve them to clear this game.)

The hint feature

The powerful hint feature is available.
This feature allows you to gain insight into how to solve the levels and to see detailed descriptions of the gimmicks.

Latest news

• Patch Notes·31 Aug 2026Official

  Maxwell's puzzling demon v1.5.29

  Levels Update I've made some adjustments so that players won't get stuck in w9. Changed 9-11 to make it easier to find the required behavior. Added hints on how to move blocks to 9-15?. Adjusted the difficulty of 9-16.
  Read full article on Community Announcements (muratsubo)

• Patch Notes·10 Aug 2026Official

  Maxwell's puzzling demon v1.5.28

  Level Updates Changed 9-14, 0-4, 0-23 and 0-α. Fixed and Adjusted the difficulty of 0-9 (reaching 0-13, clearing 0-14, clearing 0-9 and reaching 0-A). Fixed w0 to prevent an alternative solution by exiting from right side of 0-9. Updated again in v1.5.28b: Improved the symmetry of the layout. Other Changes Fixed the priority of level entry regarding meta levels.
  Read full article on Community Announcements (muratsubo)

• Patch Notes·14 Jul 2026Official

  Maxwell's puzzling demon v1.5.27

  Level Updates Added 6-21 (reaching 6-22). Replaced 0-λ group with new puzzles. Changed 8-3 to a simplified version of the old 0-λ group. Changed w6 (clearing w6 and reaching 0-η). Adjusted the difficulty of 3-8. Slightly modified the terrain around 2-1 and 2-8 in w2. Changed the appearance around 3-17 group in w3. Other Changes Disabled the game engine’s default setting that saves screenshots locally when the F12 key is pressed. Fixed a bug that could occur in w8 and beyond where, if a piston with a movable side was stuck to a fixed block and could not retract, pistons with lower priority were not processed.
  Read full article on Community Announcements (muratsubo)

• Patch Notes·20 Jun 2026Official

  Maxwell's puzzling demon v1.5.26

  Levels update Changed entering 0-I, clearing 0-I and clearing 0-K. Changed B-23. Slightly changed 0-E. Improved the appearance of B-17 and B-27. The solutions remain unchanged.
  Read full article on Community Announcements (muratsubo)

• Patch Notes·29 May 2026Official

  Maxwell's puzzling demon v1.5.25

  Levels update Added some steps to B-24 (clearing B-24?₁) and B-31 (entering B-P). Improved 3-3 as a tutorial.
  Read full article on Community Announcements (muratsubo)