Um so I used to be able to download on Windows for free, did it like twice before, but now I have to pay $2.00!?
The easy-to-download binary is now priced to support the developer. The source code is still available in the GitHub repository linked on the page and you can build the game for free from source, requiring a Unity build and some dependencies to do so, although I do agree that making the executable paid is a bit bothersome for most of the users. Keiwan explained this change in the game’s latest changelog