If anyone's interested in this sort of puzzle, the game Noita is filled with them. A large chunk of the code's in lua and you can inspect it!

The final puzzle for the game is a cryptographic puzzle that's been unsolved for five years now. Folk have done just about everything imaginable to solve the puzzle.

Adding onto this, the Noita Eye messages are a great read for someone who has some spare time:

https://noita.wiki.gg/wiki/Eye_Messages

New AGI Benchmark just dropped (in 2019)

The wand building community is also a fun dive. The reddit and discord is filled with people doing things like animating the rickroll music video to exploiting int overflows to kill all loaded enemies.

This is a great real world example of where leetcode is useful.

One of the nice features of one of the mods I've used is making bedrock one level thick, and flat everywhere. Feels nice to me.