Online Universebuilding
I'm thinking about creating a tool that lets you explore a procedurally generated universe using a system of "visual folders." For example, you'd see different PNGs representing galaxies, and by clicking on one, you'd access a folder with star systems laid out on a grid. Clicking on a system would reveal orbits, planets, and so on.
The cool part is that anyone using the tool could "settle" on a planet by creating their own alien species and attaching it to the planet. You could provide all kinds of details about your species and planet, like images, biology, fauna, culture, and more.
Also you would have the chance to explore things already created by every other person.
What do you think of this idea? Does anything like this already exist? Any suggestions to make it better?