Linux is "I promise I will try". I'd love to say 'sure!', but the simple truth is that I don't know much about Linux, and there's possible complications with the fact that we're using video backgrounds and so there could be codec issues - the demo uses h264, the full game is planned to use h265. That said, there are options that I'm looking into, which MIGHT mean 'Linux has static backgrounds', it MIGHT mean 'it runs okay under WINE/Proton/etc', or it MIGHT mean 'I'm really sorry, but it doesn't work, sad-face.' It will definitely be 'please don't ask for support running it, because I just don't know Linux well enough to offer it on that platform'.
I know that's kinda bad Kickstartering, and the expected response is "Absolutely, and a bag of chips!", but I try not to promise anything I can't be 99% sure I can guarantee. However, you're not the first to ask, and I do promise to at least do what I can, as a writer-programmer with a copy of Unity and folks I know who want it.