I'd like to point out that the Linux version is very outdated (0.12.2, when the current version is 0.18.1), plus the 32-bit Windows version is also quite outdated (0.17.3 so not quite as much). On Linux one can use Wine to try and emulate Windows apps, but it doesn't always work, and even when it does, it's 32-bit.
I know it's a pain and I try to avoid anything 32-bit, but even if it's not ideal, the Win 32-bit version is still better than nothing, and Linux users like me are actually getting nothing...
I was really curious about the game but I was quite disappointed when I saw the versions, so I've put it on hold and added it to my to-do list. I'm still curious but over 2.5Gb when my laptop has only one Hard Drive slot, which has a 240Gb SSD... Seriously, consider releasing updated Linux or Win64 versions.
Also, it might be a good idea to release a compressed version. Obviously I can't speak for everyone but, being a programmer, many people come to me for help and advice and I can say for sure almost everyone would think twice before downloading over 2Gb to try out a single game, and pretty much everyone who either has a lot of free storage or can easily afford to buy more are older people with a lot of money and who don't play any computer games at all... Or are programmers like me and use either Macbooks or Linux...
I don't know how long it takes to convert/compile stuff, but hey, if there's anything you may want help with, do say so, I may be able to help somehow since as I said I'm a programmer. I didn't figure a way to compress compiled Unity Games yet, but doing it before compiling the release (Or whatever Unity may call taking the Source files and generating the Distributable) should be pretty easy, including automating everything, from compression to generating all the releases, both compressed and uncompressed...