I'm happy to hear that you enjoyed the game! The spin speed increases every 5 pizzas delivered, and the number of ingredients on the pizza increases to 4 at 15 orders completed, and 5 at 30 orders completed. I was worried about making the game too difficult, so the spin speed doesn't increase that much. I feel that by 30 pizzas, is getting fairly difficult, but maybe it should have gotten more difficult sooner.