Please elaborate how you cannot download it. Please provide screenshots
#Cannot download!
gleaming sundial
hard osprey
Looksa like you need to claim a key and add it to steam first. I've you've done those two steps you should see it in your library and there you can click download.
Grab a playtest key from this link: https://gleam.io/Xt1Yy/project-f4e-email-key
gleaming sundial
Then get a key from that link