I just finished it, twice too, back-to-back. It's really an amazing game.
I suppose the issue is with the ZA/UM politics (the original creators have been forced out of the company), so some people are suggesting to pirate it instead. That is up to you.
Mine's set to the Application/Menu key on tap, and as a Fn modifier when held, so the WASD keys act as the arrows, Q and E as PageUp/Down, and R and F as Home and End. It's gotten so convenient I do that subconciously on keyboards that don't do that, and I end up with SSSSSSSSS or EEEEEEEEEEE.