Downloaded and extracted twice. Start new game and accept Alpha version notice. Screen goes black background with turning mining icon and goes no further. Waited up to 1/2 hour.
I also have the same problem.
Had to ‘End Task’ in the Task Manager
Here is the last lines of the Player.log file.
Scene 'Scenes/ProceduralWorldDesert' couldn't be loaded because it has not been added to the build settings or the AssetBundle has not been loaded.
To add a scene to the build settings use the menu File->Build Settings...Ah, I’m sorry I should have double checked the final build and the game should have let you know it had trouble loading a lot earlier. World generation usually doesn’t take much longer than loading a save.
@gakivi and @jtaultis1 I just uploaded a fix, let me know if you run into any other issues 
Thank You, It is working.
Onward to build a new city, Colony Alpha VI