This is a copy of Recettear. If you want to do quests AND run a shop, play Recettear. http://www.carpefulgur.com/recettear/downloads.htm
Try the demo and buy if you like it!
Pretty fun. Could you add the ability to rotate the pieces with the arrow keys? Also, change the colors of the pieces for each level? ex. lvl 1 = blue, lvl 2 = green, ...etc