Building a game is the easy part, the tokenomics is what is so difficult. Most games lean on being a ponzi or resort to gambling. It's very hard to get around that while keeping people interested. Everyone wants to make 101%+ return on investment as soon as possible.

Good games require a lot of client side action, which needs server side verification because you can't trust the client, especially when you add crypto.

I have a few game ideas and some in progress with a couple live. The tokenomics issues are what prevents me from doing a lot more.