I don't really remember how i've come with that idea :) Basically i've become obsessed with word games lately and made couple of them. I'm most proud and happy of those two:

https://pixletters.com https://betweenle.com

As for Enlinko, it's hard game to balance. That's why i've made three difficulty levels. As for daily puzzles, i'm now using semi automated generator - it generates lot of pairs, try to solve them, check if solution counts match some rules and then i'm hand picking those potential pairs for daily puzzles.