I might be freaking out for no reason, but figured on release there might be a Linux download since, its afterall listed as such on the homepage.
So when will there be a linux build?
If not, when and how come?
(Also not to forget Mac is not selectable either)

You are not the only one, I can only hope this is just a slight delay on their part.
The game was advertised as being for Linux and Mac as well as Windows, after all

Is this a universal delay? Are the macOS and Linux versions unavailable on Steam etc. as well?