Daily · timing
Sky Stack
Tap to drop each sliding block. Only the overlap stays, so line it up. Land it dead-on for a Perfect!
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Sky Stack
0 blocks
How to play Sky Stack
A block slides back and forth above your tower. Tap the screen (or click, or press Space) to drop it.
- Any part that hangs over the edge is sliced off and tumbles away. The next block is only as big as what was left.
- Drop it almost exactly on top for a Perfect! Nothing is cut, and you hear a little chime.
- Three or more perfects in a row and each new perfect grows the block back a little.
- Miss the tower completely and the game is over. Your score is how many blocks you stacked.
The daily tower
Everyone gets the same tower each day: the same colours, the same start sides and the same speeds. You get one scored run a day. Then share your height and challenge a friend to beat it. If you are tied on height, more perfect drops wins. Practice gives you unlimited random towers that don’t change your daily score.
Tips
- Watch the edge of the block below, not the whole sliding block.
- Find a rhythm. The blocks speed up as you climb, but they always travel the same distance.
- A small block is hard to save. Perfect streaks are how you get width back.
Why it’s good for you
Sky Stack is a test of timing and visual attention: judging a moving object against a fixed target and acting at the exact moment. Games like this train hand-eye coordination and sustained focus, and the speed-up rewards staying calm under pressure.
Free, no account, works on any phone or computer.