I am going to note here just incase there is confusion about the card crafting:
You have to first slot one of those orange balls into the cards corner for you to add anything else
(0 energy does not work)
After that you can slot keywords to the card, and numbers to those keywords (just follow the arrows)
Click forge, and it adds the card to the heroes deck.
There is no ending to the game, as we quite in a hurry, but I hope we managed to get atleast the basic idea of what it would be like to be constantly pestered by some random adventurer :)