Since you own this factory, it's your responsibility to take care of it. You need 5 symbols to ship a box. 4 machines, 4 symbols. You start with nothing but 1 dollar. You can buy the Addition Machine with this amount of money. Subtraction: $2 Multiplication: $4 Division: $6 These machines are basically levels. Addition: Level 1 Subtraction: Level 2 Multiplication: Level 3 Division: Level 4 Every shipment is $2. Don't forget: This project is COMPLETELY MOBILE FIENDLY. But still, Have Fun!
I'm sorry but if you click the back button, Division shows up, but if you're on computer just play the game how it is. Just buy Addition if you haven't started yet, or if you got Subtraction, just go to menu and click <-- (Left Arrow).