Like the author states, the "written in Rust" bonus many projects get does not apply to games. Most of the games I consider to be the most fun are built on an absolute rats nest dumpster fire of code (see: https://www.youtube.com/watch?v=k238XpMMn38). Sometimes bugs even expand game mechanics and make them more fun and expressive. That being said I'll definitely check out Unrelaxing Quacks, it looks great.