October 1, 2026 · 2 min read

Boosters explained: when to use Undo, Magnet, Crane, +Bay and Hint

Boosters turn a jammed lot into a win, if you use the right one. Here is what each booster does, the situation it fixes best and how to earn more without paying.

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Undo

Takes back your last move. Best when you sent a vehicle to the station one tap too early. It is cheap and precise, so try it before reaching for anything bigger.

Magnet

Pulls passengers who match the vehicles in your bays to the front of the queue. It is the fix for a buried colour: a bus sitting half full because its riders are stuck behind others.

Crane

Lifts any vehicle straight from the lot to the station, whatever is blocking it. Perfect for the one vehicle boxed in at the centre that the queue needs right now.

+Bay

Opens one extra bay for the rest of the level. The calm choice when bays keep filling up; on long levels with many colours it can save the whole run.

Hint

Highlights a smart move worked out by the same solver that checks every level. Use it to learn: the move it suggests often reveals a plan you had not spotted.

How to get boosters for free

Win streaks: 2 wins in a row give a free Hint, 4 a Magnet and 6 an extra bay.
Lucky wheel: 1 free spin a day, plus 1 more after 3 wins.
Missions, chests and the free season pass hand out boosters and coins.
Every win pays coins that buy boosters in the shop.

Boosters and stars

Using two or more boosters in one level costs one star, while a single well-timed booster costs nothing. That is why picking the right one matters. Boosters are switched off in Battle, so pure skill decides those races.

Put it into practice: your next level is one tap away.

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