Looks like people from the Groupee's bundle don't see the button. It should be fixed soon. Hang in there.
Thanks, can't wait!
Just remeber it's not actually released on Steam yet! Hopefully within a day or 2. It's been submitted for approval. They keys will just put the title in your library.
I'll be sending another email to everyone when it's ready to play on Steam!
Wouldn't Groupees-purchasers see that key in there Groupees library anyway?