Added shops

You'll now usually find one shop in the randomized level, sometimes two shops. Shopkeepers emit random greetings and sell random items in exchange for your treasure. Like other graphics, the shopkeeper graphics are placeholders showing the intended art style but not the intended level of quality and polish. (We borrowed them from Suzie's art contributions to our previous games instead of getting brand-new photographs for them.)

It might be a little while before the next update. We're considering setting Dream Doll Guardian aside for part of February to enter a different project into a game jam.