Alpha 0.16 is now available on the Test Build branch. There are a bunch of great new additions, changes and fixes. Notable changes include new geothermal power generation, improved construction and hauling behavior, UI improvements and more. If you're interested in helping test this new version, check out the link below.
For more information about the 0.16 Test Build, including release notes:
https://steamcommunity.com/app/704510/discussions/3/1732089092447281294/