AFTER
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01 · Slide, then stop

Choose a direction. The arrow slides until it meets a wall, a trail, or the edge. You cannot stop halfway.

The diamond is your exit. You must stop on it. Passing over it does not finish the puzzle.

02 · Leave an afterimage

Every position you leave joins a continuous white beam, including your starting position. Your landing cell stays clear.

A trail marked 3 blocks the next three successful moves. The number and tiny pips beside a beam show its remaining life. Its number drops after each move; at zero it disappears. Blocked attempts spend no moves.

03 · Shape the route

A trail can stop you where an empty corridor could not. Approach from a different direction and use your own history to land on the exit.

Long Memory puzzles keep trails for four moves. Later, a trail or your arrow on a round switch holds its striped gate open for your next slide.

04 · Think freely

No timer, no lives, no penalty for undo. If you trap yourself, undo or restart. There is no wait action.

↑ ↓ ← → or W A S D to move. Z to undo. R to restart. You can also swipe the board or use its buttons.

05 · Mirrors & brakes

Diagonal mirrors turn a slide by 90°. Your arrow keeps moving and leaves one connected trail around the bend. Brake pads stop you the instant you enter them; launch again in any direction.

06 · Keys & one-way gates

Collect a key to open every padlock in that puzzle. Chevrons mark one-way gates: enter only in the direction they point. A key stays collected until you undo or restart.

07 · Fragile floors

A cracked floor becomes a permanent obstacle when you leave it, even during the same slide. You can create a useful stopping point or destroy your only way back. Undo restores the floor.

08 · Spikes

Spikes shatter the arrow and rewind the failed slide. No lives or moves are lost. Your key, fragile floors, and trails return to their state before that slide.