Every bounce plays the next note
The song is the script. The engine places the bounces so the physics performs the melody note by note.
Simulation modes
43 modes run on this engine. 11 are finished and yours to create with. The other 32 are playable previews, and your votes decide which one we finish next.
Available now
Every setting unlocked, exports on
Break out through the rings
Nested rotating rings, one gap each, and a ball trying to find its way out. Suspense is the entire product.
The ball paints as it moves
The trail never fades. The ball is a pen, the canvas keeps every stroke, and the finished drawing is the payoff.
One ball becomes hundreds
One ball becomes hundreds, and the arena fills a little more every second. Everything on this page is specific to that mechanic.
Find the gap, dodge the spikes
The ball is trapped by its own history. Every bounce leaves an obstacle, so the arena gets harder as the run continues.
Orbit a spinning spiral tunnel
A rotating spiral tunnel packed with box targets. Balls are thrown in, driven inward, and clear the track on the way.
Smash the spiral apart
A glass spiral built from real cells, cracked and cleared one impact at a time.
Shatter a tower of glass plates
One ball falls down a tower of identical glass plates, and each bounce punches through twice as many as the last before rebounding all the way back to the top.
Country flags battle down to one winner
Country flags bounce inside a ring, each one holding a fan of strings. A ball that touches another flag’s string cuts it, and the last flag still holding a string wins.
Wave 3D
3DA 3D grid rippling in waves
A 3D grid of spheres or cylinders that rises and ripples in waves. You control the formation, layout, harmonics, impact sounds and lighting.
A marble plays a real instrument in sync
A marble descends a 3D course whose every platform is part of a real instrument, such as a piano key, a xylophone bar or an organ pipe, so it plays the instrument you are hearing.
32 more modes, and you pick the order
These run today. Open any of them in the studio and watch a full run with sound. What is not finished is the tuning around them, so a preview is locked to our default settings and cannot be exported yet. The most-voted modes come out of development first.
The ball grows until the beat drops
A ball grows inside a ring while the track holds back, a face keeps flashing behind it, and the moment the ball is big enough the beat drops and the face stays.
Roll down a marble course
A marble falls down a course of platforms, and the course was built backwards from your song so that every landing is a note.
Armed balls fight to the last
Named, coloured fighters carry orbiting weapons and cut each other down until one is left, with HP bars, damage numbers and a finisher on the KO.
Racers sprint down a long track
Named racers drop down a long obstacle track with a live leaderboard, and only whoever is currently leading gets to play the song.
Sweep every target on screen
One ball, a screen full of targets, and a counter asking whether it can light up every last one.
Sand, water and fire settle into art
Sand, water, oil, fire, plant and stone pour into the arena and react with each other until the whole thing fills.
Drop through pegs into scoring bins
A staggered peg board over a row of scoring bins, run either as a named race everyone can bet on or as a continuous satisfying rain.
Only matching colours shatter
The ball keeps changing colour and can only break bricks that match it right now, so every approach is a question of timing.
Spin, stack, first silo to fill wins
Two teams hold a stash, a prize wheel decides what happens to it, and the first silo to fill past the win line takes the match.
Marbles outrun a rising hazard, last one wins
Named marbles are trapped in a shaft of staggered platforms while a hazard climbs a step every bar. Touch it and you are out.
One ball rolls through x1 to x4 multiplier gates until hundreds of balls flood the arena and smash a giant pane of glass.
Rainbow metronomes drift out of phase
Rods pivoting about one point at slightly different speeds, drifting from a line into a wave, a spiral and a full bloom, then snapping back into line.
Fill a 3D room until it overflows
Thousands of balls pour into a glass room on the beat until the pile reaches the fill line, and then the glass gives way.
A jelly ball wobbles inside glass
A pressure soft body that wobbles, compresses and splats inside a glass container, with an optional challenge asking whether it will fit through the hole.
A heavier ball crushes the cubes each round
A chrome ball with its weight written on screen drops onto a structure of thousands of cubes, and it gets heavier every round.
Spinning disks scream, then stop dead on the beat
Around fifty spinning coins rising to a scream and then stopping dead, one at a time, in the order the formation asks for.
A knife halves a fruit again and again, one cut per note
A knife takes one piece and splits it in two on every note, so the board fills by doubling with real cut faces on every piece.
Tumbling balls sort into colour bands
Mixed-colour balls tumbling in a slowly rotating drum that separate themselves into clean colour bands, over and over.
Drop through a tilted peg board into bins
A real plinko machine leaning back on its stand, where every peg hit plays the next note so the descent arpeggiates your melody.
Sand draws the note you are playing
Sand on a vibrating plate collecting along the lines that are not moving, so the pattern is a picture of the note being played.
Cube clusters bloom on every beat
Cubes assembling a recognisable artwork a chunk per beat, or blooming and collapsing as slow-motion fireworks made of voxels.
A magnet powers up until it encases itself in cubes
Thousands of metal balls clump, get carried by a magnetic field, and rain down in a metallic clatter when it switches off, harder every cycle.
A chain reaction ending in a giant
A chain reaction sweeping along a spiral, a heart, a star or a branching tree, ending with a domino the size of a grain of rice toppling a slab taller than the camera.
Marbles race a 3D track to the podium
Named marbles racing down a descending 3D track with a live leaderboard, where only the leader gets to play the melody.
A chaotic particle cloud that never repeats
Tens of thousands of GPU particles tracing a strange attractor: a cloud that never repeats itself and never leaves its own silhouette.
Tens of thousands of particles sliding through a divergence-free noise field, so they drift like smoke and never clump or drain away.
Liquid metal blobs merge and split
Liquid metal blobs that stretch toward each other, merge into one surface, and pull apart again, drawn per pixel rather than as a mesh.
Stars collapse into a spinning disc
A cloud of stars collapsing under gravity into a flattened spinning disc with spiral arms, with new mass injected on the drop.
Thousands of lights blink into sync with the beat
Tens of thousands of oscillators blinking in chaos until the coupling crosses a threshold and the whole swarm snaps into unison on the beat.
Guess the magnet, then zoom into the fractal
A magnetic pendulum swings over three magnets and settles on one of them. Guess which. Then the camera zooms into the fractal that answers it.
A living network links every food node
Hundreds of thousands of agents following one local rule, building a pulsing vein network that has to reach every food node before it starves.
Thousands race the clock to get out the doors
Several thousand individually simulated people trying to get out of a hall before the clock runs out, jamming the doorways exactly as real crowds do.
Open any mode in the Studio
Every mode runs in your browser. Finished modes let you change the colours, sounds and physics and export a vertical video for Shorts, Reels or TikTok. Previews run on default settings.
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