I bought Nox during the sales and I'm completely stuck.

When I launch the game (after the introduction), the graphics freeze. And only the graphics because I can hear the music and I can also hear the sound played when you move the mouse cursor on a button. So, the game works but graphics are completely freeze.
I tried to use Alt+Tab and return on the game but it doesn't change anything (except for the screen which now show the moment in the game when I returned on it).

I don't know what sould I do.

Thanks for the coming responses.

Try a combination of these:
- Run in compatibility mode for Windows 98 / ME
- Disable visual themes and desktop composition
- Set your desktop color depth to 16bit
- Set CPU affinity to 1

And check this thread too.

How do i set my desktop Color Depth to 16 bit

Read here if you're using Windows 7.
If you have Windows 8, then you should use the "Compatibility Mode" (right click on the executable and choose "Properties"), where you can set a "Reduced Color Mode": read here.

I did the first two steps on windonws 10 and now it works fine.