Drag a box along its track. Boxes only slide the way they're facing.

How to play Filter Jam

The blue NED box needs to leave through the van door on the right.
Drag any box to slide it. Wide boxes slide left and right; tall boxes slide up and down. Nothing can jump over anything.
Clear a path, then slide the NED box out the door.
Each slide counts as one move, however far it goes. Match par (the fewest moves possible) for 3 stars.

Keyboard: press Tab to pick a box, then use the arrow keys to slide it.

Tips

Work backward: find the box blocking the door, then ask what's blocking that box.
Tall boxes in the door row are the usual troublemakers. Look for where they can fit above or below.
Stuck? Hint shows the next best move, and Undo takes back as many moves as you like.

About Filter Jam

Filter Jam is a free sliding block puzzle in the style of classic traffic-jam puzzles, with 40 levels that start easy and end very hard. Every level was checked by a computer solver, so par is the true minimum. It works on phones, tablets and computers with no download and no sign-up, and your progress is saved in your browser.

It's made by Ned Games and inspired by real delivery days at Ned Air Filters in San Antonio, where a van full of AC filters really can get jammed.