The game doesn't start on Linux (Ubuntu 18.10) without a janky workaround. When running it from the terminal, it gives an error, saying:
jre/lib/amd64/server/libjvm.so: cannot open shared object file: No such file or directory
Error: failed to load VM runtime library!
The file it specifies is missing (the "amd64" folder only contains jvm.cfg, not a "server" folder or anything else). It appears that the version of Java included is the Windows version, not the Linux version. Replacing the "jre" folder with one from a working Oracle Java installation fixed the issue and allowed the game to start.