We now have a stable beta on the Windows Store. If you are on Windows 10, you can grab it here: https://www.microsoft.com/store/apps/9n4shfc15wks.
Using an earlier, obsolete and outdated, version of Windows? Then you can either upgrade to Windows 10 or wait for our upcoming release on Steam!
If you are a Mac or Linux then it should come as no surprise that you are, as is often the case, out of luck.