I'm a software developer who is specialized in reverse-engineering (among other things).
I'd like to take a look at this, but I'm unable to find the Linux version of the game anywhere.
I also have concerns about the availability of the online services which host a lot of the required game files.
I've already started archiving the DRM-free versions for other platforms from
viewtopic.php?f=23&t=210223 and also started archiving graphics packs at
https://github.com/JayFoxRox/Pro-Pinbal ... /GFX-packs (are there any missing from that list?).
If I get access to a Linux version of the game, I'll probably investigate the issue and try to come up with a workaround / patch.
I've already has some success improving the macOS version.