Where is the linux save data location and is there any setting menu to change things like the music volume?
I don't think I've added a sound setting for this game. It an be adjusted in volume mixer in Windows, but I don't know about Linux.
According to the internet, the save path for Linux should be:
$XDG_CONFIG_HOME/unity3d/Impy/Sweeper/
The command:
Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData)
will apparently get you what XDG_DATA_HOME is.