Yea the puzzle is pretty confusing xD But it isn't random, just look at each light separately, there are 4 lights and the code is 4 digits long.
but You also didn't miss much the level ends just after it, and I don't think I'll be doing more since now I am learning UE5 for some time and it seems way better suited for what I want to do, in a month or so I should be able to release next project (with proper inventory, movement and more interactivity).