Move one mover and its mirror-twin moves with it, solve both halves of the room in a single stroke.
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How to play
You control two bodies with one set of controls, and they do not move the same way. Press left and the primary goes left while the mirror clone goes right; press right and they swap. Up and down are shared, so vertical movement is the only time the pair agrees. Every puzzle is the problem of getting two things to the right places using inputs that push them apart.
Horizontal input is mirrored: the clone always moves the opposite way to the primary.
Vertical input is shared: both bodies move the same way at once.
A body that cannot move simply does not, while the other still does — so walls are a way of breaking the symmetry deliberately.
Resolution is fully deterministic, so the same sequence of inputs always produces the same result.
Controls
Desktop: arrow keys or WASD to move, U or Z to undo, R to reset
Phone & tablet: swipe to move in any direction
Game modes
Campaign with a level select
Daily seeded puzzle
Practice
Tips & strategy
Use walls to desynchronise. Pressing a body into a wall it cannot pass moves only the other one, which is the single most useful trick in the game.
Vertical moves are your free reposition. They preserve the horizontal gap between the two bodies while changing everything else.
Solve for the harder body first. One of the two usually has a far more constrained route, and the other can normally be walked into place afterwards.
Think in gaps, not positions. What matters is the horizontal distance between the pair, and only mirrored moves and walls can change it.
If a puzzle looks impossible, look for the wall you are meant to lean on. There is almost always one place where the mirror is supposed to break.
Origins
The crate-pushing grammar is Sokoban's, from 1981.
The original constraint is dual-body control. Press left and the primary goes left while a mirror clone goes right; up and down are shared, so vertical movement is the only time the pair agrees.
That makes every puzzle a search for inputs that are correct for two bodies at once. Sokoban is already about planning past deadlocks; with a mirrored partner half your options are eliminated before you start, so the solvable routes are narrow and mostly run vertically.
About Mirror Crates
Mirror Crates is an original crate-pushing puzzle built around symmetric dual-body control. Free to play in your browser on PlayPendium.
A free, original browser game on PlayPendium. No download, no install.
