I created this puzzle hunt back in September, but have been waiting to release it publicly since Cracking the Cryptic used it as their monthly patreon reward in October. There are several puzzles involved (castle wall, akari, sudoku, cave) and it has received a lot of great feedback, so give it a try.
Everything you need is in the pdf linked above. Feel free to shoot me a message if you need a hint or just want me to verify the final solution.
Enjoy, and happy treasure hunting!