Here is a recommendation. Make different settings where you can change different settings like how many boxes you need to restock, ability to run away from customers and lose them, different maps, different store types/layouts, randomly generated aisles, how many customers there are, how nice or mean they are, etc. Also port the game to Consoles, macs, and Linux. You have a very nice game here as it is! Also make a much higher graphical quality game for a little more money charged to us, maybe a dollar or 3 more. Make this game 2 dollars flat, and make the higher graphical quality game 4-5 dollars or something.