Wobble Stack — a free crane tower stacking game in your browser

Wobble Stack hands you a crane, a swinging hook and one button. Tap and the block lets go — but it does not fall straight down, because it keeps whatever sideways speed the hook had at that instant. Release at the end of the swing, where the hook is briefly still, and it drops almost vertically. Release through the middle, where the hook is fastest, and it sails halfway across the site before it lands. Learning to release before your target rather than over it is the first thing the game teaches, and it takes about three blocks.

What makes it a tower rather than a stack of drops is what happens after the landing. Every block that lands off-centre adds lean, and the whole structure starts to sway — slowly at first, then wide enough that you are timing your release against a moving target. Land one square and the tower straightens back up, which means a wobbling tower is a problem you can fix rather than a countdown. Leave it too long and it goes over, leaning further and further for a full second before the blocks come apart. You will have seen it coming three drops earlier. That is the point. It is free, needs no download, and works with one thumb.

How to play

• Tap anywhere — or press Space — to release the block from the hook.
• The block keeps the hook's sideways speed, so aim ahead of where you want it, not at it.
• Land square (within about a tenth of a block) for a STABILIZED bonus: the tower's lean drops by a third.
• Land badly off — more than about six tenths of a block — and it slides off entirely. No score, a big wobble, but not death.
• Watch the lean meter. When it fills, the tower goes over and the run is done.
• From about ten blocks up, wind pushes falling blocks sideways. The flag on the crane tells you which way.
• Your score is the number of blocks you stacked, with your perfect landings recorded beside it.

How this differs from Stack Rush, and why both exist

Snappy Arcade already has a tower game, and it is worth being clear that this is not the same game with a new coat of paint. Stack Rush is about slicing: a block slides across the screen, you stop it, and whatever overhangs is cut away, so a sloppy drop makes your next block narrower. The punishment is local and permanent — you can see exactly what you lost, and everything below you is untouched.

Wobble Stack punishes you globally and reversibly instead. A misplaced block takes nothing away; it destabilises the entire structure underneath, including the blocks you placed perfectly ten drops ago. And unlike a slice, that damage can be undone: land square and the lean decays. So the two games ask for opposite habits. Stack Rush rewards a steady, unambitious rhythm, because every mistake shrinks your margin for the next one. Wobble Stack rewards knowing when to stop being ambitious — spending a drop on a safe, square landing to buy back stability, rather than chasing the block you actually wanted.

The other difference is where the tension lives. A Stack Rush run ends instantly, on the drop that misses. A Wobble Stack run ends about three drops after the mistake that caused it, in slow motion, while you watch. That gap is deliberate: a failure you can see approaching and cannot quite outrun is a far stronger reason to press play again than one that simply happens.

More games

Try Stack Rush or Tower Jump, or browse all games.