Thanks for the responses and links.

I saw the Phemex puzzle was still active but I didn't see any info on what to solve for. I think "what" to solve for was my big question (words, numbers, do angles represent numbers?!?! etc.). So I guess typically you're looking for a Private key or Seed phrase?

It is still hard to wrap my head around understanding "where" the objects (numbers or letters) are hiding, especially when I see some puzzles that look like simple paintings (or drawings)!?! Anyway, thanks.