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Sky Stack

Find your rhythm and stack a colorful tower into the sky.

Sky Stack

Take a moment, find your rhythm and make your first move.

Music and sound start after your first tap. You can turn them on or off separately.

Your progress is saved in this browser. Changing language keeps your current round.

Sky Stack — Game guide

Your goal

Drop each moving block onto the tower below. Only the overlapping part remains, so careful timing helps you build higher and improve your score. Wind pulses start at floor 8; perfect placements on every fifth floor earn an extra bonus.

Tips to try

  • Watch one full pass to judge the block’s speed before dropping it.
  • Focus on keeping a wide platform instead of rushing the next tap.

Questions about the game

How do I drop a block?

Tap or click the play area, or press Space while the game has keyboard focus.

Why do my blocks get smaller?

The part that sticks out beyond the tower is trimmed away. A complete miss ends the round.

Zupleo

Help make Zupleo better

Found a problem or have an idea? Create a report, then share it with the maker yourself.

Include the steps needed to see the problem. Please leave out personal details.

This report has not been sent automatically.

Zupleo, one tap away

Add Zupleo to your home screen and open your games with one tap.

In your browser

  1. Look for an install icon in the address bar or an installation option in the browser menu. On a Mac, check the File menu as well.
  2. Choose Install app, Install this site as an app or Add to Dock, if available, and confirm.
  3. No installation option? You can save a bookmark and keep playing in your browser.

An internet connection is needed to play.

Share a little fun

Choose where to share. You decide who receives the link.

For Instagram or TikTok, use your device’s sharing menu or copy the link.

Game progress and settings

Zupleo saves your language, favorites, scores and privacy choice in this browser so they are available on your next visit.

Read our privacy notice

Local speed test

Measurements stay on this page. Nothing is sent automatically. Copy or download a report when you choose.

Collecting locally

Close this panel, play a round, then reopen it to read the results. If the game is paused, choose Resume first.

Page loading

Navigation → first byte
Not available
HTML ready (DOMContentLoaded)
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Load event
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First visible content (FCP)
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Largest content (LCP candidate)
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Game start

Start a game to measure its loading and play.

Start request → ready
Not available
Ready → first game action
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Ready → first practice action
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Action times include reacting, thinking and any prior practice. They are not loading times. An interruption cancels unrecorded action times.

Game smoothness

Measured frames
Not available
Typical interval (median)
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95% of intervals at or below
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Longest interval
Not available
Intervals over 33.3 ms
Not available
Intervals over 50 ms
Not available

Latest 1,200 raw engine intervals during ordinary play. Pauses, hidden tabs and practice are excluded. The first interval after a break is skipped. Lower intervals are smoother; device refresh rate matters.

One local visit, not a Lighthouse or Core Web Vitals score. LCP is a native page candidate; INP and iframe content are not measured. Missing values are not zero.

Technical report