Blind Puzzle Box illuminated

So ... I printed the "Russian Doll Maze Puzzle Box" by RevK (https://www.thingiverse.com/thing:2410748), which is so much fun. Not too difficult not too easy. I brought it to my office and my colleagues enjoyed it very much. Then one of them stated that it is way too easy and he needs a challenge.
I went back to thingiverse and found the "Blind Puzzle Box" by Clarkerubber (https://www.thingiverse.com/thing:2178599).
I made a testprint ... found some issues with tolerances ... printed the "REMI