Can be printed pla or petg, needs support on the play area and cover.

Other than that, maybe ironing if you want a smoother finish.

The aim of this game is to get the big square out of the box.

First, you need to set all pieces according to the game start positions showed in the photo. 

Then, by moving the pieces up, down, left, right you need to find a way to free the big square. You are not allowed to lift any piece from the playground. 

The arrow is the direction you should point the big hole in the playground