Hi!
Some of you are suffering issues to use the shift+tab to open the Steam interface. We can not fix it right now through Steam without harm the 32 bit people.
Here is a link to the patch, so you can apply it and fix that issue:
https://db.tt/kTDQMSUy
I encourage you again to add me to your friends list and tell me all that you don't like about the game, We are a crowdfunding project and we want to grow up with our client's critics.
We want to offer you a full client assistance through Steam, so you can talk with us for anything you want, if you are stuck or simply you want to change something specific in the next chapter.
We are here to help.
Sergio
http://steamcommunity.com/id/SprietoGato/