Pictassembler is an engineering puzzle game where you set up a production line of marbles and operator blocks to assemble pixel art images one block at a time. Each marble can be stuck to an anchor or an existing pixel block to create a pixel block in a given location, and can also be shaded appropriately. The finished block shape needs to match the solution image to finish the level. The challenge comes in setting up the placement and timing of the marbles' paths to ensure that they land in the solution grid correctly.