I'm thrilled that there is a Linux build now, but is it possible at all to export my Windows save data so I don't have to start from scratch?
On Linux, the preferences are saved in $HOME/.config/unity3d/Variety is Hope/VineWorlds/ and it looks like the preferences are available in plain XML in the prefs file in that directory. So you can export the registry entries as a .reg file, then open and compare both in a text editor and change the properties in the prefs XML accordingly.