Echochrome requires the player to control a moving character—which resembles an articulated wooden artist's mannequin—to visit, in any order, particular locations on the surfaces of collections of three-dimensional shapes. The objectives are marked by shadows ("echoes") of the moving character. When the last marked position has been visited, one last echo appears, which the player must reach to finish the level: scoring is simply a matter of timing completion of each level. (wikipedia.org).