Press spacebar to continue with story/instructions. Use the variables to set your food prices. Don't press the up arrow key, because that ends the game. (I added that feature because as long as you keep the place clean, the game can go on forever.) You can answer anything you want when a costumer asks if they can buy something, as long as it starts with the letter "y".
If I used your username in this game (go to the "Costumer" sprite and look through the "Usernames" list to see all usernames) and you would not like it there, simply comment and say so. Once I check my mail (which is pretty often: every time I get a new message during the daytime) then I will remove your username ASAP. (P.S. Marylando was a huge, popular grocery store that retired in this game.)