Haha, I really love the word search. All my usual tactics fall apart - the limitation on the letters is adversarial in an oddly satisfying way. Cool idea.
Thanks, yeah I like the way it's effectively a kids game, but made very hard by one simple change.
Placing the words/extra letters in a way that you don't accidentally make duplicates was a challenge involving a _lot_ of tree walking.
Oh interesting, I hadn't considered that, but of course that would be quite the challenge haha, with relatively short words like you picked