Hello everybody, this is my first post.
I have some suggestions about the merchant. Instead of selecting the cards and then their quantities one by one I think it would be easier to drag&drop cards directly into a chart, open it, remove cards if needed (the gold you are going to spend or earn should be shown both on the icon and in the chart menu) and then proceed with the transaction.
I'll be soon posting the "other upcoming stuff", which is a list of improvements and features I would personally find good for the game.

Here's the chart idea: the 0 is the current amount of gold the cards in the chart are worth. Also, the icon could be a sack of coins.
Cattura.jpg