So the previous Deiland game was retired from the Steam store recently, and is no longer able to be purchased, and a new “Remastered” version is being planned:
You can read about what you need to do in order to claim your free copy of that game when it eventually releases.
If you don’t want to click on the link, here’s the pertinent info:
If you have Deiland, the previous version of the original game, on your Steam Library, don’t worry. You won’t have to purchase it again. Just complete this form before the game releases and we’ll send a Steam key for Deiland: Pocket Planet for free!
You will have to put in your email, Steam name, and also a screenshot showing that you own the game.
According to the news update, you need to do this prior to the release of the Pocket Planet edition, so definitely make sure you jump on it sooner than later!
Not sure what is going on, clearly the Google forms is not currently available, probably b/c like others have mentioned, this is very cumbersome and unnecessary because Steam should be able to do it automatically for people who already have the original game. We will just have to wait and see what happens I guess.