The build
Shunt began as an argument about whether a puzzle game could ship on Google Play without a single energy meter. Every level is a small freight yard: a set of loaded boxcars, a set of sidings, and a fixed number of switch throws to get each car where the manifest says it belongs.
The 240 levels are hand-built rather than generated, ordered so that each new mechanic — spring switches, gravity humps, locked wagons — is taught by a puzzle that is impossible to fail before it appears in one that is hard to solve. Solutions are verified by a solver that runs in CI, so no level can ship unsolvable.
It is our most-installed title and the one that pays for the prototypes that do not work out.
What is in it
Plays offline, completely
The whole catalog of levels ships in the 34 MB download. No account, no connection check, no sign-in wall.
One purchase, no meters
Free through level 60, then a single unlock. No energy, no hint currency, no rewarded interstitials between attempts.
Solver-verified difficulty
Every level carries a machine-measured minimum move count, which is what drives the difficulty curve instead of designer guesswork.
Built for one thumb
Switch throws sit inside a reachable arc at the bottom of the screen, tested on devices down to a 4.7-inch display.
