Hi Willsama,
Re-posting this here from Steam. The Steam keys are on their way, and should be available very soon!
We'll make a post with an updated guide as soon as they become available. In the meantime, this guide from the Clone Drone In The Danger Zone forum seems to cover the correct procedure to obtain a key once they become available: https://itch.io/t/67604/how-to-get-a-steam-key-from-your-itchio-purchase
You can, of course, also obtain the latest version of the game here on itch.io right now!
Edit: Your save file also carries across from here to Steam, it appears! Which is cool, and totally an intended feature that I was aware of before just now. ~ Daniel