How to Play Stack Block
Stack Block is a tap-timing tower game: a colorful block slides back and forth above your growing stack, and tapping the screen stops it in place and drops it. Only the part that overlaps the block below stays as the new floor — the rest breaks off as falling debris — so the tower narrows every time your timing is off.
Lining a drop up exactly with the block beneath it triggers a PERFECT placement, marked by yellow text and a burst of confetti, and the score you earn per floor grows the more precisely you stack: an observed run climbed 2, 14, 26, 42, 62, 86, then 114 points across seven consecutive floors.
The run is 10 levels long, and each one sets a target floor count that climbs from 8 on the first level up to 17 on the last. New complications unlock as you go — the block's entry side becomes unpredictable, its slide speed starts varying, feints appear, the whole tower begins to sway, and blocks start blinking out of view — layering on top of the base tap-and-stop mechanic.
Each level runs on its own two-minute clock, and clearing it quickly pays off: an 8-second clear of level 1 added a 112-second time bonus to a final score of 114. Missing the stack badly costs one of three hearts shown on screen, and clearing a level opens LEVEL and FULLSCREEN buttons rather than advancing automatically.
Tapping the title screen does double duty — it starts the run and places the very first floor at the same time, so the tower is already one block tall the instant the screen goes fullscreen.
Controls
- Tap anywhere to stop the sliding block and drop it onto the stack.
- Only the overlapping part becomes the new floor — the rest falls away.
- Line a drop up exactly with the block below for a PERFECT placement.
- The opening tap both starts the run and places the very first floor.
Tips & Strategy
Chase PERFECT placements for bigger jumps
The points awarded per floor climb steeply the more precisely you stack — a run that placed seven floors in a row saw scores rise from 2 up to 114 points, with each PERFECT drop marked by yellow text and confetti. Slowing down to line up a drop is worth it once a level's target floor count starts to feel out of reach.
A fast clear is worth chasing too
Clearing a level quickly adds a time bonus built from whatever's left on its two-minute clock — an 8-second clear of level 1 added 112 bonus seconds worth of points on top of the floors themselves. Once you're confident in your timing, don't slow down more than the level actually needs.
Three hearts give you room to recover
Each level shows three hearts of retries, and a badly misjudged drop costs one rather than ending the run outright. Treat an early miss as recoverable rather than a reason to panic, since running out of all three is what actually ends the attempt.
Later levels change more than the floor count
Beyond climbing from 8 required floors to 17, the run is built to add new complications as it goes — blocks entering from random sides, their slide speed varying mid-level, feints, a swaying tower, and blocks that blink out of view. Expect the tap-and-stop rhythm you build on level 1 to need adjusting as these layer in.
Frequently Asked Questions
Is Stack Block free to play?
Yes. It runs directly in your browser with no download or account required.
How many levels does it have?
Ten. Each one sets its own target floor count, climbing from 8 floors on the first level to 17 on the last.
How do I control the block?
Tap anywhere on the screen to stop the sliding block and drop it. Only the part that overlaps the floor below stays; the rest falls away.
What happens if I misjudge a drop?
A badly misaligned drop costs one of three hearts shown on screen. Running out of all three ends the attempt.
Is there a time limit?
Yes. Each level runs on a two-minute clock, and clearing it with time to spare adds a bonus to your score.
Does the game change as I go?
Yes. Beyond needing more floors per level, later levels add complications like unpredictable entry sides, varying slide speed, feints, a swaying tower, and blocks that blink out of view.
