After receiving the game, it is added to your library (if you have given consent) and the game is downloaded from the library
Viewing post in The Subterranean Farmer comments
I'm afraid that I can't download it directly from Download button bellow "You own this game" line, nor from the Download button from my Library.
The line still "Nothing is available for download yet.", even I hit the Download button from my Library.
The file is shown to be downloaded only when click to "Download Now" button in the front page.
It also happen to Tower Tycoon.
Hope you fix this soon.