Cubic maze

Print each of the sic parts laying flat on the rear side. 0,2 or 0,3 mm layer height. No supports needed.

Use super glue to attach parts together. You can use pieces of filament as a pin guides during glueing. Each side is different, refer to provided images for correct assembly.

For the ball, best is to use 14mm acrylic bead: https://www.aliexpress.com/item/1005001373801282.html?spm=a2g0o.order_list.0.0.fab61802vZteGR

Of course you can print your own ball. See provided STL.