I just bought the early access of Steam, but can't play it for some reason. When I start it, I get the pop-up saying this is an early version, feedback wanted, yada yada yada, and that's about it. There's no button to click the pop-up away, and nothing else happens. I've tried starting the game three times, but still nothing.
I'm on Win 8.1 64-bit, if that helps.