A crane slides a block left and right — tap / click to drop it onto the tower. Land dead-center for a PERFECT, big points and a combo! Real physics makes the tower wobble, so misaligned drops eventually topple it. Drop one block and it's game over. How high can you stack?
Tower Stack
Drop crane-carried blocks to stack a tower. Real physics makes it wobble — how high before it topples?
📖 How to Play
- Tap / click / Space to drop the block the crane is sliding left-right
- Land it dead-center over the block below for a PERFECT (big points + combo)
- Chain PERFECTs to keep raising the combo multiplier
- Physics makes the tower wobble — misalignment builds up until it leans and falls
- The crane moves faster the higher you climb
- Drop a block or topple the tower and it's game over
- Compete on the global leaderboard by height (blocks stacked) and score
About this game
Tower Stack is a physics puzzle: drop blocks from a crane that slides left and right, and build the tallest tower you can. It runs on the Matter.js engine, so your tower genuinely wobbles, leans and eventually falls.
Landing a block dead-centre on the one below scores a PERFECT, worth big points and a combo. Chaining PERFECTs raises the multiplier, so precision converts directly into score.
Small misalignments shift the tower's centre of mass, and at some point the whole structure leans past recovery. A single sloppy drop can cost you a run dozens of blocks later. The crane also moves faster the higher you climb, so the late game is a real concentration test.
Each block is worth +10, and a PERFECT — landing dead-centre on the block below — pays +20 plus 20 per combo step. So an unbroken run of PERFECTs matters more to your score than raw height. Every misalignment feeds straight into the physics engine as lean, and it accumulates: one sloppy drop is often what topples the tower several blocks later. The crane also speeds up as you climb, so reacting to what you see stops working in the late game. Counting the rhythm of its sweep and releasing from the turn-around point is far steadier.
Tips & strategy
- The crane moves on a fixed cycle — counting its turnaround points makes timing much easier
- Before chasing PERFECTs, simply avoid big misses. Accumulated drift is what actually topples towers
- After a slight miss, bias the next block the other way to pull the centre of mass back
- The crane speeds up as you climb, so switch to releasing slightly earlier as the pace rises
- Don't rush consecutive drops — waiting for the tower to stop swaying makes each landing more reliable
- The tower sways more as it grows — watch the rhythm and release as it passes centre
FAQ
Q. What is a PERFECT?
A. Landing a block exactly on top of the one below. It scores big and builds a combo multiplier as you chain them.
Q. How does the game end?
A. When you drop a block off the tower or the stack topples over.
Q. What are the controls?
A. Tap, click or press Space to release the block — that's the whole game, and it's playable one-handed.
Q. Is the physics real?
A. Yes, it runs on Matter.js, so accumulated misalignment genuinely tips the tower over.
Q. How high can I stack?
A. Around ten blocks at first, and several dozen once you're practised. How you handle the faster crane in the late game is what separates records.