I'm excited about this one.
Addition:
The shop lever! A lever to the side of every shop that allows the player to refresh the items on the shop counter for a price. This price will increase each time you pull the lever. The price will increase as you get into later dungeon levels.
This will allow players to exchange gold for a chance of better weapons and items, and more health, earlier. This should make the game a little easier.
If you can make it to the shop with some gold in your pocket, you've got a good chance of making it a little further.