I have the same issue, only my screen is black at the outset, I cannot use the menu.
System note: I have an external monitor that I use with the laptop (Retina Macbook pro late 2013, also has discrete graphics card) closed. The resolution is 2160x4096 (not a typo, it's a 4K LG monitor that I use rotated vertically).
The path I took was: Run the game, it launched in window mode - however the sides of the game were cut off, with large black bars at top and bottom of the screen. I could not change the window size by dragging the edges.
Thinking it would fix things, I switched to fullscreen mode. Oops! As soon as that happened, I have a totally black screen.
Now I cannot exit fullscreen mode, ever. Cmd-F briefly flickers the screen, during which time sometimes I get get mouse presses through to the main menu, but not the top screen menu bar (so I cannot ask the game to change resolutions). Re-running the game automatically starts in fullscreen now, not windowed.
So basically I cannot play at all. (
The music is nice...
Edit: Did not play beta (missed out on backing through KickStarter, just pre-ordered on Steam a day ago)