Ok so I thought I'd give the Dev version a go and went to load Gravitron after seeing it said it should now be working. When clicking on it, I get a black screen and nothing loads. When I press any key on my keyboard, Windows pops up with an error:
Program: D:\Steam\steamapps\common\Take On Mars\TKOM.exe
Reason: Access violation. Illegal read by 0 at 0
Press Retry to debug the application - JIT must be enabled"
When you press any button, the game crashes. So yeah, not sure what caused it, but I have reloaded the game and I get the same bug occuring.