Few months back, I also tried to create a short puzzle game called Diffudle. The game was basically AI Art + Wordle. You were given an AI generated image and you have to guess the prompt for it.

Initially, I got some traction on the site and even some strangers started promoting it.

But I soon realized that there is very little marketing spend reward. The customers spend no money and ad revenue per user is abysmal. This means you can't use conventional channels and have to rely on people actually finding it fun and recommending it to others.

Although it was getting recurring traffic with zero promotion, it still couldn't reach a self sustaining level and I had to shut it down.

You can see Youtube video of it here: https://youtu.be/uLoMd0TkGKk

The point is: Getting the right puzzle formula is extremely hard and every puzzle will not grow like "Wordle".