https://playcebo.itch.io/12-word-searches

Technically not even a browser game, it's a PDF that you can save locally and either mark up in a browser (I used the highlighter tool) or print out and use a pen/pencil.

It starts simple but there are multiple layers of puzzle here, but all firmly in the "word search" category of puzzle. I found it satisfying. 

But they are getting harder to find in grocery stores where I am. Thanks for posting this!