Tiny Tower Stack guide: one tap per floor, perfect drops, and width recovery

Tiny Tower Stack is a stacking game with exactly one input. A floor of shops slides in, you tap once, and it drops onto the tower. Whatever hangs over the edge gets sheared off. Tap badly enough that nothing overlaps and the run is over. That is the whole game — the depth is in reading the slide and keeping the tower wide.

There are no levels. A run simply continues until you miss, and your score is how many floors you stacked.

Tiny Tower StackTap to drop sliding shop floors into a growing tower, and let AI write the founding charter of the town you built.Play free in your browser →

The one mechanic that decides everything

Only one axis matters on any given floor, and it alternates. The incoming floor is an exact copy of the floor below it, so whichever axis is not currently moving is already perfectly aligned by definition. Floor 1 slides along one horizontal axis, floor 2 along the other, floor 3 along the first again, and so on.

This is worth internalising because it changes how you read the screen. You are not trying to place a square inside a square. On each floor you are lining up a single edge, and which edge alternates. Once you know that the pattern flips every floor, you stop looking for two alignments and start watching one.

The floor also arrives from a side that flips every second floor. The very first floor of a run and the floor after it come from opposite ends, so do not assume the floor will always enter from the same side of your screen.

How to play, step by step

1. Pick Today's Town or Free build from the title screen. Today's Town gives everyone in the world the identical sequence of shop types for that day, derived from the date.
2. The first floor slides toward the tower. It starts off to one side and travels across continuously.
3. Tap anywhere on the board, or press Space or Enter, to drop the floor. Tapping on a button will not register as a drop, so tap the open playing area.
4. Read the result and repeat. The camera follows the top of the tower upward as you climb.

A small "tap to drop" hint stays on screen until you have stacked 3 floors, so you do not have to discover the input yourself.

What the three outcomes mean

Every drop resolves one of three ways.

• Perfect. You landed within 5 internal units of centre, measured against a 200-unit base. Nothing is cut, and critically, a perfect drop re-centres the new floor on the tower in both axes. That means perfects can never cause your tower to drift off to one side — a perfect drop actively repairs lateral drift.
• Cut. You overlapped partially. You keep the overlap, the excess shears off and falls away, and your perfect streak resets to zero. This is the normal case, and most of the game is played here.
• Miss. Zero overlap. The run ends immediately and your floor count is final.

The strategic consequence: because the overlap is kept, a single sloppy drop usually costs you width rather than ending the run. Death only becomes likely once your top floor has become very narrow, because a narrow top makes every future overlap smaller and a total miss far easier to produce. Width is life.

Three perfect drops are your only healing

Stacking 3 perfect drops in a row unlocks width recovery. From that third perfect onward, every further perfect drop adds 8 units of width back, capped at the original 200-unit base. No other event in the game gives width back.

There is a subtlety that matters at height. Because the moving axis alternates, successive perfects widen alternating dimensions: one widens the tower's width, the next widens its depth. So if you cut badly on the width axis, your three-perfect combo will only restore width on every other perfect. Plan a recovery streak with that in mind, and do not assume three perfects always undo a recent cut.

Chasing perfects also has a cost. A perfect requires a tight alignment, and the floor is moving faster the higher you are. If a safe cut keeps your run alive and a greedy perfect attempt would end it, take the cut.

Stars come from height, not technique

Stars are a pure function of how many floors you stacked:

• 1 star below 20 floors
• 2 stars at 20 floors or more
• 3 stars at 40 floors or more

Your perfect-drop count is shown on the results card and counts toward your town charter and your postcard, but it does not affect stars. If you want three stars, the only route is more floors.

Speed, and where beginners actually lose floors

The slider's speed is 150 plus 7 units per floor already stacked, capped at 430 units per second. It hits that cap at exactly 40 floors. That means:

• Floor 1 moves at 157 units per second.
• Floor 20 moves at 290.
• Floor 40 and everything above moves at the same maximum speed.

The consequence is that your real difficulty curve is not linear. The gap between floor 30 and floor 40 feels much larger than the gap between floor 10 and floor 20, because the speed is still climbing steeply right up to the cap and then abruptly stops climbing. A run that stalls at 25–35 floors usually stalls on speed and narrowness together.

A second thing to watch: each incoming floor spends roughly its first half of the sweep outside the tower entirely, since it starts at the far edge of the play area. Aim for the moment it crosses the tower, not the moment it appears.

Techniques that actually raise your ceiling

• Protect width before chasing height. A cut costs width permanently and only a three-perfect streak gives it back. When you are already narrow, play the safe cut and rebuild, rather than gambling the run.
• Use perfects to fix drift, not just to score. Because a perfect re-centres both axes, lining up a perfect is the only way to pull a leaning tower back over its own footprint. If your top floor has slid well off-centre, prioritise clean perfects over large but imprecise cuts.
• Watch the entry side. It flips every second floor. Confirm which side the floor is coming from before you commit to a timing.
• Treat 40 as the real wall. Speed caps there but the tower is also at its narrowest relative to the base. Getting past 40 usually means your earlier width decisions were good.
• Stay flat deliberately. The AI charter writer reads your actual shape. A tower that stays broad and sturdy is described very differently from one that tapers to a thin spire, and a run that ends as a needle reads as a deliberate design rather than a collapse.

Today's Town, charters, and postcards

Today's Town seeds the shop sequence from the UTC date, so every player in the world gets the same sequence of shops that day. Free build uses a random seed. Neither mode changes the rules or the scoring.

At the end of a run, an AI town clerk writes a charter from what actually happened: your floor count, your perfect count and best streak, your most common shops, the shop on your top floor, and a description of your tower's shape. The charter is a name, a motto, and one town law. You need 3 floors minimum; below that the council declines and asks you to try again.

If you want a postcard of your town printed, you need 5 floors, and the button is also gated on print availability. Your last 12 towns are kept in the save file, along with your best height and the last 30 days of daily bests.

If you only remember three things

1. Only one axis moves per floor, and it alternates every floor.
2. A perfect drop costs nothing, re-centres your tower, and only three in a row starts giving width back.
3. Stars are height-based: 20 floors for two stars, 40 for three. Nothing else moves that number.