Maze Cube 4x4x4

3D-maze cube. Very simple puzzle. It consist of 4 flat mazes (4 levels). You should put ball in hole marked as <<< and then tilt cube left-right and back-forth. If you found true path, ball shall falling down from hole marked as >>> Before printing of whole cube, I recommend to print small piece of maze as a test, e.g. from 13 to 21 mm (see photos). Sure that all bridges are printed with good quality. I printed it with 0.6 mm nozzle and 0.3 mm layer height, but you may 0.4 mm nozzle and 0.2 mm layer height. You may use another ball, e. g. steel or marble. Diameter of ball should be less or equal 15 mm.