Just for your info libfaudio0 is available for Debian bullseye and sid in the Debian repo's. It has not been backported yet, I think, for buster. The bullseye/sid package should also work on buster but you have to check the dependencies of the libfaudio0 package as you might have these in the buster...

The FAudio packages are not distributed from dl.winehq.org because FAudio is not part of the Wine Project, and our building them is only a temporary workaround until distros start providing FAudio packages. FYI, Fedora 29 and later and Debian Sid have already added FAudio packages to their reposito...

Specs of the game says Win 95 required, so there will be no guarantee the game will run on Wine XP mode, earlier Win versions in Wine have been dropped AFAIK. You could try installing it on a Virtual Machine like Virtualbox with Win 98.