Stack Free online game

Action
Solo
Easy · Normal · Hard

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Stop the moving block at just the right moment to build high

What is it?

Stack is a timing game where you stop a block sliding back and forth at just the right moment to build a tall tower. Any overhang gets cut off, so every misalignment makes the next block narrower.

Line it up exactly for a PERFECT, and after three in a row the block grows wider again. The fun is that even a narrowed tower can be rescued with precise timing.

How to play

Tap the screen and the moving block stops where it is
Any part hanging over the block below gets cut off
Line it up exactly for a PERFECT! Three in a row and the block grows back

Playing on PC (keyboard · mouse)

On phones you tap the screen; on PC you can also use the mouse and the keys below.

Space · Enter	Stack
Esc	Pause · back

Difficulty and rankings

Difficulty	Easy · Normal · Hard
About the difficulty levels	Easy: slow blocks, generous PERFECTs · Hard: fast, with strict PERFECTs — each difficulty has its own best score and ranking
Ranking	Highest score first · separate rankings for phone (touch) and PC (keyboard · mouse)

There's a weekly ranking and an all-time ranking; the weekly one resets every Monday at midnight (Korea time). For details, see the Help.

Good to know on Hanpanmadang

Your score is the number of floors. If a block stops almost exactly on the one below, it counts as PERFECT and nothing is cut.
The PERFECT window is 1.4× wider on Easy than Normal and 0.8× as wide on Hard. It stays the same even as the block narrows.
After 3 PERFECTs in a row, each further PERFECT widens the block a little, up to its original width.
You can continue once per game. No ad is required, and your score and time carry on.

Common mistakes

Tapping early in a panic once the block gets narrow.: The PERFECT window doesn't depend on block width. Watch one full pass and tap the moment the edges line up.
Hesitating for fear of breaking your PERFECT streak and tapping late.: Breaking the streak only cuts off the misaligned part. Keeping your rhythm beats missing by a lot.

Tips

Count the rhythm in your head to match the block's speed and you'll make fewer mistakes.
Instead of following the moving block with your eyes, fix your gaze on one edge of the block below; you'll catch the moment it crosses that line more precisely.
When the block is narrow, don't rush — there's time to watch one full pass before tapping.
After two PERFECTs in a row, focus hard on the third. The reward of a wider block is big.

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