Window Puzzle

This is an 11 piece puzzle. After printing, it should be installed in a piece of foam core (as pictured) or an alternative material to function as a standing wall with a window cut out of it that is slightly smaller than the puzzle. After installation, to solve the puzzle, the pieces are moved up, down, left, and right to open up the window. However, it is only a prototype, so the pieces do not move as smoothly as they should. Also, if the design is modified, it would benefit from being made big