(made from 1/8" thick laser cut plastic, board 2 layers, pieces 1 layer, 3.6" x 5.6" x 1/4")
A puzzle with many pieces and much white space.
The solution sheet that comes with the puzzle shows a
105 basic steps,
many of which are composed of several rectilinear moves where some require two pieces to slide together;
here a 12 of those positions: