Just finished this, it's a GREAT puzzle and I loved every moment of it. Managed to solve everything perfectly with the slow progression of putting all the hints together. I think it strikes a perfect balance of every little piece of each puzzle being a hint to the other puzzles. I also loved the little trick of how Puzzle 11 had two identical words, I was laughing when I realized that. The shapes of puzzles and words are also very fun. Overall just extremely well done!
There was only one time I ran into an issue: The leftover letters in Puzzle 1 seem to be giving me the word "ARCKINGANY" instead of the seemingly intended "LACKINGANY". I'm not sure if I'm somehow doing it wrong or if it's an actual issue with the puzzle...