My first two games were built with my own hacky web sockets implementation. From a software perspective it's pretty messy, but it gets the job done haha.
I actually had built an alpha version of my 3rd game with my own networking code, but because it is more of a real-time game, there were tons of bugs. Switching to use Hathora for the back-end logic has made the game much more stable so I can finally work to release the game.
You can check out my first two games here: https://gomobo.app/. They play kind of similar to Jackbox games, but with more strategy board game elements. Would love to hear what you think!