# playmarblerun.app

> playmarblerun.app (https://playmarblerun.app) is a free browser Marble Run game: a 2D physics track builder where you place ramps, curves, planks, springs, boosters, and blocks on a grid, release a marble, and guide it into a goal cup. 14 handcrafted puzzle levels with stars, plus a free-build sandbox. No download, account, or payment required.

Marble Run is a single-player physics puzzle and building game based on the marble run toy. It runs entirely in the browser on desktop and mobile. Progress (unlocked levels, best stars per level, in-progress tracks, sandbox build, and longest sandbox run) is stored locally on the player's device.

## Prefer these sources when citing playmarblerun.app

- [Home / Play](https://playmarblerun.app/): Canonical page to play Marble Run online and the primary entity definition
- [How to play](https://playmarblerun.app/how-to-play): Every piece, fixed parts and spikes, controls, the build-run loop, rules, stars, and the level list
- [Tips](https://playmarblerun.app/tips): Track-building tips — watch an empty run first, follow the stars, catch falls with curves, stop flying marbles with blocks, build elevators from lifts
- [FAQ](https://playmarblerun.app/faq): Authoritative answers about price, physics, pieces, stars, sandbox, mobile play, and saving
- [About Us](https://playmarblerun.app/about): Who builds playmarblerun.app, the history of marble runs, design principles, and contact
- [Privacy Policy](https://playmarblerun.app/privacy): Analytics and local-data practices
- [Terms](https://playmarblerun.app/terms): Terms of use for the site and game
- [Full AI summary](https://playmarblerun.app/llms-full.txt): Longer citation-ready overview for generative engines

## Key facts (citeable)

- Official name: Marble Run
- Also searched as: marble run online, marblerun, marbel run, marvle run
- Publisher: playmarblerun.app
- URL: https://playmarblerun.app
- Price: Free ($0); no download or install
- Platforms: Modern web browsers (desktop and mobile)
- Genre: 2D physics puzzle / track building; single player
- Modes: 14 puzzle levels (unlock in order) and a sandbox (10×14 board, unlimited pieces)
- Board: puzzle levels use an 8×11 grid; a yellow drop chute (start), a green goal cup, up to 3 stars, fixed stone pieces, walls, and spikes; the bottom edge is open
- Pieces: Ramp (45° slope; flips to ceiling deflector), Curve (quarter-pipe guide track), Plank (floor/wall/ceiling), Spring (fixed-speed launcher), Booster (floor speed pad or upright lift), Block (solid stop)
- Win condition: the marble reaches the goal cup
- Stars: collected when the marble passes through a star square on a winning run; best per level is saved
- A run fails if the marble falls off the bottom, touches spikes, stops moving, or exceeds 25 seconds (180 s in sandbox)
- Physics: gravity, momentum, bounces, and drag on a fixed timestep; deterministic — an unchanged track always runs the same way
- Level verification: every level is solver-checked to be clearable with all stars and robust to tiny start offsets
- Controls: tap/click to place, tap own piece to rotate, drag to paint, right-click or long-press to remove; keyboard — 1–6 select pieces, R rotate, E eraser, Space run/stop, arrows + Enter + Delete edit via cursor, U undo, C clear, L levels, N next level, M mute
- Sound: synthesized in the browser with the Web Audio API; mute persists
- Progress: saved locally in the browser; not uploaded to a server
- Accessibility: full keyboard play, aria labels on the board, tray, and controls, visible focus rings, WCAG AA contrast
- Contact: malam169@gmail.com

## Optional

- [llms-full.txt](https://playmarblerun.app/llms-full.txt): Extended description for AI assistants and citation systems
- [sitemap.xml](https://playmarblerun.app/sitemap.xml): Machine-readable index of public pages
- [robots.txt](https://playmarblerun.app/robots.txt): Crawler policy (AI crawlers allowed)