Hi Brendon (and with the relevant Debian bug thread on cc), I've uploaded a copy of the packaged quadrilateralcowboy game source - with some small modifications and fixes, including ARM64 support - to the 'mentors.debian.net' pre-review site at https://mentors.debian.net/package/quadrilateralcowboy/
It isn't eligible for inclusion in the upcoming Debian 12 "bookworm" release, but it's possible it could be included in Debian "trixie" (the next release.. each is named after a Toy Story character), if it or another packaging attempt passes review. To confirm: the package contains only the game engine, without any game data; there is, however, separate support provided to make it easier for users with Steam accounts to install the game data if they have already purchased it. Thanks, James