Rail Switch Rush

Rail Switch Rush is a fast, one-hand puzzle set in a night train yard. Trains enter from the top of three or four lanes, each painted the colour of the station it needs to reach at the bottom. Tap an X crossover between two lanes to flip it; while it is on, trains on either lane swap sides as they pass, both directions at once. Read the incoming colours, flip the right crossovers at the right moment, and send every scheduled train home to its matching station to clear the level. Each level adds more trains, more speed, and eventually a fourth lane, so the routing puzzle keeps building.

Controls: tap or click a crossover diamond to flip it. Keys 1-9 also flip crossovers by index. Space or Enter starts the run and continues past a level result.

Runs entirely in the browser with zero downloads, zero accounts, and no network connection needed once the page has loaded.