When I went to the download page, just below the “Download” button was a box that said “Claim Steam key”.
Hey there, sorry i didn't saw this thread before. Unfortunately all steam keys are gone right now. I won't refill them anytime soon either. Let me explain: I set this game to a 100% off so people have something to distract them for a few hours during their self isolation (I honestly didn't think it would blow up this much :D). However like it is usually the case: Some people seem to only take advantage of the situation. A few (not many, just very few) people seem to have claimed their steam keys for free only to sell them on G2A, Kinguin and so on. I am not mad about it, but I also don't want to encourage this behaviour even more.
However, I can see that you went as far to even pay for the game so I will happily send you a key! :) Do you have a twitter account or something where I can send it to you? You could also toss me a mail to: info@siactro.com and I send it to you that way. Also thank you very much for your support! <3 :D