I'm having this problem also in my HP Pavilion g6-1113eo (win7, 64bit).
The game starts with jamming loading screen. alt-tab switching back and forth shows me the rainy main menu for 2 frames. I've paid few euros for worse games so I don't really mind

I'm running the game through Steam and have no idea where it is installed.
I tried changing to a full power battery profile, but it seems senseless that a bare screen brightness-setting could affect a game this deeply.
Now, if the game has a problem with DirectX (my version is up to date, v.11), then the dxdiag.exe should tell something relevant towards solving this problem, right? My graphics come from an integrated Intel-i5 that is "Intel(R) HD Graphics Family" with 1696 MB of Display Memory (Dedicated Memory: 64 MB + Shared Memory: 1632 MB).
I also tried to setting the colordepth to 16-bit to no avail.
I'm open to suggestions on what to test next. Or maybe the game will get a worthy update.