How to play

Drag across empty cells to lay belt. Tap a belt to erase it. Drag a second direction over a belt to make a switch.

Every item has a distinct color and shape. Gameplay is solvable even in grayscale — shape alone disambiguates items.

• Paint: recolors items passing through.
• Box: wraps items into boxed form.
• Sorter: routes items by color and shape.
• Assembler: merges two colors into one.
• Block: impassable obstacle.

Every level has a par. Beat par for 3 stars; up to par x 1.5 earns 2 stars; anything more earns 1 star.