> - Consider having some sort of overarching thing in your puzzle, so it’s not just five words on a specific topic to guess, but something more, like a hidden word across all five etc. This makes a delightful discovery moment and sometimes might work as a clue.

You've essentially described the Jumble puzzle, which appeared in daily newspapers. It's been around since 1954, but I'm not surprised to see it reinvented since few people get a daily newspaper anymore.

https://en.wikipedia.org/wiki/Jumble