Starting the game results in a white screen with a flickering hourglass.
It's even difiicult to kill it, since the task forces itself at every flicker to the foreground.
Alt+F4 works after a while.

Win10, 64Bit, 16GB RAM, Nvidia 960 GTX, all drivers up to date, no overclocking.

Had a glance on some other forum about this problem, and there was mentioned a "patch" (some wrappers of sorts) from "someone" which may fix this. (yeah... sure... -.- ... and get driveby whatnot-else)
But ... ugh... really?
It's really annoying.
Thought these times were gone for good (it's not an "old" game, where such behaviour could be expected)
I don't want to make a game out of, figuring out how to start the actual game.

So... no sneeky action for me. :(
But yeah... apparently there is something about my system, which won't allow it to work.
Now go figure...


Solution:
Check / Repair installation.

I just tried it.
Don't know what it did or why I had to do this, but it works now.
yeayy :)

I had freezing starting on level 4. Restarted computer, didn't fix it. I did the verify option and it seemed to have resolved the issue.

Microsoft Visual C++ 2012 and Microsoft Visual C++ 2010 both x86 and x64 are needed to run the game. I suggest getting them (all 4 installers) and running a repair installation and then rebooting your PC.

As a last resort you can run in safemode:
To launch in safe mode, you have to edit the file StyxGame.ini which is located at '\Documents\My Games\Styx\StyxGame\Config'
Then find the line bLaunchSafeMode=false and modify the line to bLaunchSafeMode=true.

edit: just realized you got it working, YAY!