The Fangames section can be augmented with a Cargo table and infobox, that makes data entry easier with a form, and allows metadata to be queried by third-party apps and more importantly, search engines.
title- The title of the game.
image- A screenshot, if any.
platform- The game platforms that were supported by the game: Windows, Mac, Linux, or maybe even actual consoles (if it is a romhack or mod).
mod- Whether the game is a ROM hack/game mod, or built from scratch. (Default: No)
franchise- The original franchise the game is based on (e.g. Metroid, Mario, Chrono Trigger).
- If it is not a fan game, you should use an actual Game template instead (also needs to be made).
release_date- Date the game was released to the public.
takedown_date- Date that the game was issued a DMCA takedown notice, if any.
homepage_url- Homepage of the game.
community_url- Primary community/subreddit for the game.
download_url- URL where you download the game.
Use categories in the free text section to function as tags, subjects, genres. Category:Fangame is automatically applied (maybe that page should be the new main page for this).