I found a problem with rockets. I don't know if this was intended but there is a way to basically duplicate money. In the shop you can buy a stack of rockets for 3000. I found it was much cheaper to buy the materials to make rockets where I could spend just 2,490 for 3 stacks of sugarcane and 3 stacks of gunpowder to make 9 stacks of rockets. I can then sell the 9 stacks of rockets for 14,849 and basically duplicate the money.