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Erich's Puzzle Palace
via jbranchaud@gmail.com
https://erich-friedman.github.io/puzzle/index.html
Puzzle
This is the kind of site that the internet was created for. A little HTML, a little CSS, a repeating puzzle piece background. Beautiful.
Here is another cool puzzle site that I found linked from the Interactive links: https://pedros.works/kudamono/pages/full-house.html