We had this for the category description:
- ZERO UI: How effectively the game conveys information and mechanics without the traditional user interface elements.
It is still open en vague, but that is also why we have 7 days of discussion on Discord about what is UI :-).
At the end you are still right we also could have added the whole forum post to the front page. We noted it down for our next special edition. Will it be the same ZERO UI or another constraint/challenge.