The game Numpty Physics is available on Endless OS through Flathub. I have just updated it to the latest version of the game, 0.3.9.
I wonder whether anybody active on this forum plays this game (either themselves or a family member) and would be interested in adopting it on Flathub? The repository is at https://github.com/flathub/io.thp.numptyphysics/. I have configured Flathub to automatically open a pull request if and when a new version of the game is made, so a first step would be to watch the repository for new pull requests and test them when they appear.