Hi all. Long time Clonk player here. Got really excited when I saw that Legacy Clonk is still being maintained! Fabulous job everyone involved.
I have created this quite hacky flatpak definition for Legacy Clonk which can be found here.
It puts all the game files under the $XDG_DATA_HOME directory before running it. That was needed because Legacy Clonk expects the directory, where the executable is, to be writable.
This is currently proof of concept, but I was able to run it on a Steam Deck!