Hi guys,
if someone is experiencing crashes at the beginning of the game: don't panic!
Your PC is ok and the game too;)
After hard working we found that the problem is drivers-related, you can fix this easily installing this drivers version:
http://www.geforce.com/drivers/results/118514
Here is deep explanation of this:
http://steamcommunity.com/app/506900/discussions/0/1368380934238964647/
Downward is not the only game victim of this, fortunately this is a relative fast workaround to enjoy Downward at best.
For this and any other matters we are here, eager to help you!
Have a nice week-end