A folder becomes a room. A file becomes a tool.

You start out as a stickman, and you have to get out of a locked folder.

Every piece of logic you need to escape is on the screen you have always looked at. You just have never looked at it as a puzzle before.

Rename a broken key file and the key works again.

Change a file extension from .txt to .exe and the bomb actually detonates.

Tick Show hidden items and a platform appears where there was nothing, while the floor you were standing on disappears.

Switch from icon view to list view and the files rearrange themselves.

The screen you have used every day, played as a game.

Stage structure

The 30 stages are grouped five at a time into six zones.

Each zone teaches one new logic per stage across its first four, and a .zip shows up on the fifth.

The four stages before it come compressed, so it asks for everything you just learned at once.

Stages 5, 10, 15, 20, 25 and 30 sit in that slot and work as a kind of mid-boss.

• 1-5 Basics — renaming, hidden items, extensions, view modes. You start by learning that the file explorer is terrain.

• 6-10 Platforms — find a route with search, read the fixed departure direction of every platform at the train station, and spin the platter in defrag.exe.

• 11-15 Memory — transcribe a scale on a music box, chat on a messenger, move between three points in time. You find your way through the records people left behind.

• 16-20 Weather and Bombs — hidden platforms and a chessboard, a demolition site, and a weather forecast.

• 21-25 Scrapyard — rotate the window in the gravity lab, flip the layout in the sorting factory, punch holes in the floor with the recycle bin.

• 26-30 Mousetrap — your cursor becomes a mouse, a cat goes after your key, and windows link into each other. This is the climax.

Clear ranks

"How well did I actually clear that?" Clear ranks answer it. Your action count decides the rank.

• Perfect Clear — finish within the model action count the developer set. The target is shown up front, so you can aim for it.

• Extra Clear — a solution that strays far from the intended route, or bends the logic to cut the action count meaningfully below Perfect. Only a few stages have one, and the threshold is never shown. Treat hunting for them as content in its own right.

Only your best rank per stage is kept, so a rank you have earned never drops and you are free to retry. The stage list on the start screen shows at a glance which stages are still worth digging into.

Comfort and challenge

• Achievements: unexpected attempts, unorthodox solutions, and a range of self-imposed challenges all count.

• Ctrl+Z & F5: undo and restart on every action, so you are free to experiment.

• Two kinds of hints — one that only points you in a direction, and one behind "show more" that names the answer outright. Use them however you like.

30 stages, 60 to 90 minutes on a first run

Single player. Keyboard, with a mouse for some stages. English and Korean.