Back It Up!

App icon
Today's yard: one daily shift, the same for everybody

What it does

A buttonhook is the move a trucker makes to dock a 53ft trailer in a lot that is too tight for it: swing wide, then cut back.

Every day there is one yard, the same one for everybody. You start loaded, in Drive, looking at a bay you cannot reach in a straight line. Make one good forward setup, shift into Reverse, and put the trailer on the dock without touching anything. Your score is how many times you had to change gear after moving. Shifting while stopped is free. A run takes about a minute.

What makes it hard

The puzzle is the setup, not the parking. Where you stop going forward decides whether the reverse line exists at all. A trailer does not go where you point it, it goes where you already put it. A guide line shows where the trailer is headed.

Controls made for a thumb

Put your thumb down anywhere and a steering wheel appears under it. Slide sideways to steer, pull down to roll, let go to stop. Arrow buttons are in the menu.

How it's built

three.js scene built with Vite, wrapped for iPhone with Capacitor. A year of daily yards is bundled inside the app. Tips go through RevenueCat as consumables with no entitlement.