Make sure you post somewhere big and obvious (and here) when it's available.
Will do! We also setup a email list you can sign up onto that will email you only when the game is released.
In steam it says the game is in early access mode, but I don't see any way to purchase this. I'm guessing it's still not set up? Game looks great, I actually just set up Steam just to get it
You can follow/wishlist it here http://store.steampowered.com/app/646570/Slay_the_Spire/ and wait. Someone has posted in the discussions asking if the game will have controller support.