It's a screen with the logo of my avatar, and it says "eendhoorn" under it. If you don't know then you probably haven't seen it haha. I'll try to get out a debug version later today that you can try, that should at least put out an error in the console window. I'll post here once it's uploaded!
I uploaded a build in debug mode, let me know if the console window shows any error messages. It should already show some gameplay text since I was too lazy to remove that everywhere :p
I think I might have found the solution for this. From the debug build it was quite clear that most people that have trouble running the game have outdated graphics drivers. So try updating your graphics card drivers :)
