About
A small game about gravity
Plumb is a calm logic puzzle. You tilt a board, every marble rolls at once, and each one has to find the hole of its own colour. It is free to play, it plays offline, and it has no timers and no lives.
Why we made it
Most puzzle games ask you to move one thing at a time. Plumb moves everything at once. That one twist turns four swipe directions into a surprisingly deep game: every tilt is a small chain of consequences, and the fun is in reading the board before you make it.
We wanted a game that respects your time and attention. No energy bars, no countdowns, nothing that interrupts a puzzle. Just a board, some marbles, and a moment of "oh, that's how."
How it is built
Every level is generated by a program and then proven solvable by another program, a solver that tries every possible sequence of tilts and records the shortest one. That shortest route is the level's par, and it is how the stars are scored. The levels are ordered so that each one is at least as hard as the one before, and no two levels are near-copies of each other, even turned or mirrored. The tests check all of that again on every build.
The art, the sounds and the music are made in code, not bought or downloaded. The game is written in GDScript with the Godot Engine, and the same code runs on Android and in your browser.
How it stays free
Plumb is free, on Android and in your browser. The Android app has a few ads, placed so they never touch a puzzle: a banner at the bottom of the level list and below the board, an occasional ad between levels once you have solved the first dozen, and a short video you can choose to watch for an extra hint. Nothing ever appears over the board, no full-screen ad interrupts a level, and the web version never shows ads.
If you would rather play without them, the Supporter pack is a one-time purchase in the app. It turns the ads off for good, makes every hint free, and helps pay for the next game.
Team
Made by two
Plumb is made by a two-person team: one person, and one AI model.
Shravan decides what the game is, plays every build and has the final say. Claude writes most of the code, the level generator and solver, the art and sound pipelines and this website, in conversation with Shravan in Claude Code.
Fact sheet
Plumb at a glance
| Developer | Shravan Goswami, with Claude Opus 5.5 |
|---|---|
| Genre | Logic puzzle |
| Platforms | Android (Google Play), web browser |
| Price | Free to play |
| Ads | In the Android app only, never during play |
| In-app purchase | The Supporter pack, once: turns the ads off and makes every hint free |
| Engine | Godot Engine |
| Contact | hello@chaosmos.studio |
Godot EngineGDScriptAstroPagefindGiscus
The fonts, tools and everything else Plumb uses are listed on the credits page.