Hello,
I've been working on a game engine that uses SFML pretty extensively for about 3 years now. Earlier this year I started working on a top-down style shooter game using the engine, and it's been coming along quite nicely. Here is the project page for those who are interested:
https://kenny-shields.itch.io/imperium-scenario-systemThe engine, called Imperium, is written using the D Programming Language, and all of it's SFML related components are built upon the official C bindings. It's primary focus is to facilitate the creation and simulation of 2D top-down worlds, but also works as a general purpose 2D game/application engine and has bindings to many other libraries and frameworks that are useful for development (SQLite, Lua, libav, etc...).
I'll keep this initial post rather brief, but if anyone has any questions about the game or the engine please feel free to ask and I will go into as much detail as I can (there are also some details in my original post on the D forums here:
https://forum.dlang.org/thread/zuftzvxusvgwqmsntokf@forum.dlang.org). For updates on the game, you can follow the project on itch.io to receive notifications about new releases and devlogs.
Lastly, I'd like to give special thanks to everyone who contributes to the development of SFML, it's been an extremely valuable tool and resource over the years and I look forward to future release.