Sounds like a solid idea—streamers would love real‑time stats, and an open‑source HUD lets devs add or tweak features. The trick is keeping it lightweight so it doesn’t hog GPU, figuring out a reliable hook into the game’s data (APIs, memory reads, or an official modding interface), and handling different platforms. A modular design with a core in Rust or C++ and a lightweight plugin interface for OBS or X11 would give you performance and flexibility. Just make sure you respect the game’s EULA and keep the license clear so the community can safely remix it.