Welcome, Cogs beta tester! This brief guide has all the info you'll need to start playing.
Step 1: Install Steam. Steam is the client that you'll use to download Cogs. If you don't have it already, you can install Steam by clicking the green "Get Steam Now" link at store.steampowered.com
Step 2: Activate your code. In the Steam client, go to the Games menu and select "Activate a product on Steam..." When it asks for the Product Code, enter the key that you were provided by email.
You can track the download progress in the My Games tab of the Steam client.
Step 3: Launch Cogs. Look for Cogs under the "My Games" tab in the Steam client. When the download progress reaches 100%, Select the game and click "Launch."
Steam will always keep your copy of Cogs updated, so when the final version of the game is released, you'll already have it. If you find bugs or have feedback, be sure to report it to Rob by sending mail to email@example.com.