Please see this link to view instructions on how to access the test:
steamcommunity.com/games/244850/announcements/detail/1739981174323382832
Also, Cosmic Chimp, EpikTek & Rabenschild will be streaming the public test tonight (Jan 31, 7 pm UTC) on the Keen Community Network Twitch channel:
www.twitch.tv/keencommunitynetwork
Good luck and have fun, Engineers!