Conway's Game of Life
When setting out to learn React, I asked a friend what I should build and he suggested I build Conway's Game of Life. I had never heard of it before, but it sounded pretty cool. I decided to build it using create-react-app
and I was able to get it working in a few hours. This was a very satisying forray into React and I suppose some sort of hobby app development creature was born.
It's a pretty wild game. Read more about it on Wikipedia.