I've recently updated to Windows 10, which fortunately fixed the blackscreen problem I was facing while on Windows 8.1. However, it seems the game is now displaying in some sort of 3D-mode, as the colors are all wrong and there's two circles in the middle of the screen, one displaying in red, another displaying in blue.

Does anyone know how to fix this problem?

disable 3D in your gpu control panel?

I've disabled 3D in the control panel and the 3D-effect is gone!
Thanks, had trouble finding the setting at first!