Doesn't run?

When I click to Play button on Steam nothing appears to launch?

Windows 7 x64

CPU: i5-3570K
RAM: 16 GB
GPU: AMD Radeon HD 7900 Series

The game is not released on steam. the steam key will be active only when the game is released. (out of beta).

Interesting - I was able to register the key and install something. I just assumed I’d be able to use the beta via Steam. Sorry.