Two UI things I think might be nice tweaks.
I'd like if the inventory button was on the opposite side of the screen from the 'proceed' button. As it is now with them right next to each other, I have multiple times meant to click inventory but accidentally clicked proceed instead, costing me items that I'd earned but just needed to make room for.
Similarly, in the upgrade and enchant screens, I have multiple times sold an item by accident instead of improving it, because they're both 'drag to the centre of the screen' actions. Not sure what the best fix is here because I can hypothetically see someone wanting to sell an item on these screens, but would be nice to make it more difficult to mix up.